Dell PowerEdge R550 Review — Gen 15 2U Dual-Socket Value Server
Dell PowerEdge R550
15th Gen 2U 2-Socket Rack Server — Up to 16 × SFF or 8 × LFF — Up to 48 Cores & 1 TB DDR4
2U Dual-Socket Value Platform for Virtualization, Databases, and Growing Infrastructure
Light and Medium Virtualization — Two 3rd Gen Intel Xeon Scalable sockets deliver up to 48 physical cores and 96 threads in a 2U chassis; 1 TB DDR4 RDIMM capacity enables high VM consolidation ratios; the 2U form factor opens PCIe expansion unavailable in 1U alternatives — run more VMs with more I/O bandwidth per host without compromising rack density
Database Servers — Dual-socket NUMA topology benefits SQL Server, Oracle, MySQL, and PostgreSQL OLTP workloads; hardware RAID with NV cache (PERC H755) protects transaction log writes; up to 16 × 2.5-inch hot-swap SAS 12 Gb/s SSDs give sub-millisecond I/O latency; 1 TB RAM supports large in-memory database operations without tiered external caching
Small IT Infrastructure — The R550 positions as Dell's primary value-tier 2U dual-socket server for organizations that need more than 1U can offer — additional PCIe slots, more drive bays, and 2U thermal headroom allow headroom for future expansion without replacing the platform
E-Commerce and Web Applications — 4 PCIe Gen 4 expansion slots plus OCP 3.0 allow simultaneous 25 GbE networking and external RAID connectivity; hot-swap redundant PSUs ensure revenue-critical storefronts stay online during power supply maintenance events
Data Warehousing and Analytics — Xeon Scalable dual-socket architecture with large last-level cache handles analytical query processing; 10 GbE or 25 GbE OCP 3.0 NIC options deliver ETL pipeline bandwidth; 128 TB raw capacity via 8 × 3.5-inch LFF HDDs covers large historical dataset retention
Business Intelligence and ERP — SAP, Oracle EBS, and Microsoft Dynamics workloads benefit from up to 1 TB DDR4 RDIMM, dual-socket NUMA locality, and hardware RAID protecting multi-table concurrent transaction streams; iDRAC9 out-of-band management supports always-available ERP infrastructure with minimal on-site IT requirement
HPC Entry and Scientific Computing — 3rd Gen Xeon Scalable improved IPC, 64 PCIe Gen 4 lanes per socket, and 4 expansion slots allow HPC entry deployments including simulation preprocessing, parameter sweeps, and Monte Carlo modeling; OCP 3.0 25 GbE enables cluster fabric connectivity without consuming a user PCIe slot
Cloud-Native and Container Workloads — Kubernetes worker nodes and Docker container hosts benefit from dual-socket core density and multiple 25 GbE interfaces; PCIe Gen 4 bandwidth eliminates NVMe SSD AIC bottlenecks on bare-metal container workloads with high random I/O requirements
Virtualization
Databases
Small IT
E-Commerce
Analytics
ERP & BI
HPC Entry
Cloud-Native
3rd Gen Intel Xeon Scalable — Up to 2 × 24 Cores with PCIe Gen 4
Platform Overview — Dual LGA4189 sockets on Intel C621A chipset; supports one or two 3rd Generation Intel Xeon Scalable processors simultaneously; Intel Ultra Path Interconnect (UPI) provides up to 3 × UPI links per socket — Silver/Gold processors at 10.4 or 11.2 GT/s depending on tier — for maximum inter-socket bandwidth on dual-NUMA workloads
Top Processor — Xeon Silver 5318Y — 24 cores / 48 threads, 2.1 GHz base with Turbo, 36 MB L3 cache, 11.2 GT/s UPI, 165 W TDP, 2933 MT/s DDR4 support; maximum available on R550 for highest core density — ideal for data warehousing, large virtualization, ERP, and analytics workloads requiring maximum parallel thread throughput in 2U
Xeon Silver 5317 — 12 cores / 24 threads, 3.0 GHz base with Turbo, 18 MB L3 cache, 11.2 GT/s UPI, 150 W TDP; higher base clock than 5318Y balances mid-range core count with elevated per-thread performance — suited for latency-sensitive database, application server, and real-time analytics workloads
Xeon Silver 5315Y — 8 cores / 16 threads, 3.2 GHz base with Turbo, 12 MB L3 cache, 11.2 GT/s UPI, 140 W TDP; highest base clock across all R550 processor options — optimal in dual-socket deployments where per-thread IPC matters more than total core count for single-threaded legacy applications
Xeon Gold 4316 — 20 cores / 40 threads, 2.3 GHz base, 30 MB cache, 10.4 GT/s UPI, 150 W TDP, 2666 MT/s DDR4; best core-count-per-dollar Gold option for mixed virtualization and database environments where 10.4 GT/s UPI bandwidth is acceptable
Xeon Gold 4314 — 16 cores / 32 threads, 2.4 GHz base, 24 MB cache, 10.4 GT/s UPI, 135 W TDP, 2666 MT/s DDR4; mid-range balanced core count for general enterprise application tiers, mid-scale clusters, and test-and-development environments where budget matters
Xeon Gold 4310 and Gold 4309Y — Gold 4310: 12 cores / 24 threads, 2.1 GHz base, 18 MB cache, 120 W; Gold 4309Y: 8 cores / 16 threads, 2.8 GHz base, 12 MB cache, 105 W; both Gold entry options at 10.4 GT/s and 2666 MT/s DDR4 — lowest power budget options for lighter infrastructure workloads
Maximum PCIe Gen 4 Lanes — 64 PCIe 4.0 lanes per socket at 16 GT/s; dual-socket configuration provides 128 total PCIe Gen 4 lanes across three x16 slots and the integrated OCP 3.0 slot — enabling simultaneous 25 GbE NIC, SAS HBA, PCIe SSD AIC, and external RAID adapter adjacency without bandwidth contention
DDR4 ECC RDIMM — Up to 1 TB Across 16 Slots at 2933 MT/s
Memory Type — DDR4 Registered ECC (RDIMM) only; the register buffer reduces memory bus loading, enabling 16 DIMM slots across dual sockets operating at high speeds with full ECC error correction; single-bit errors are corrected in real time protecting VM guest memory, database buffer cache, and in-flight transaction data
DIMM Slots and Channels — 16 total DIMM slots distributed as 8 per processor; each processor supports 4 memory channels with up to 2 DIMMs per channel; populate both channels symmetrically per socket for maximum bandwidth — dual-socket deployments should mirror DIMM population across both CPUs for NUMA-balanced memory locality
Maximum Capacity — 1 TB total (1024 GB) when all 16 slots are populated with 64 GB DDR4 RDIMMs; scales down to 512 GB at 32 GB, 256 GB at 16 GB, and 128 GB at 8 GB; choose DIMM capacity based on the in-memory footprint of the target database, hypervisor VM inventory, or analytics working set
Supported DIMM Sizes — 8 GB (1Rx8), 16 GB (2Rx8), 32 GB (2Rx8), and 64 GB (2Rx4) DDR4 RDIMMs at 1.2 V; DIMMs are rated to 3200 MT/s but the R550 platform maximum operating speed is 2933 MT/s with Xeon Silver processors — DDR4 DIMMs are forward-compatible with the platform-enforced cap
Memory Speed by Processor — Xeon Silver 5315Y, 5317, 5318Y support DDR4 memory at 2933 MT/s; Xeon Gold 4309Y, 4310, 4314, 4316 are limited to 2666 MT/s due to 10.4 GT/s UPI — select Xeon Silver if maximizing DDR4 memory bandwidth for database and analytics workloads is a priority
NUMA Topology — Each processor controls its own 8 DIMM slots forming an independent NUMA node; in dual-socket configurations OS and hypervisor route threads to local-node memory first; configure VM memory affinity in VMware vNUMA or Windows Hyper-V to keep VMs bound to a single NUMA node for consistent memory access latency
Upgrade from R540 — R540 also supported DDR4 RDIMMs but was limited to 2666 MT/s (2nd Gen Xeon Scalable ceiling); R550 raises the platform maximum to 2933 MT/s with Silver-class CPUs and retains the 16-slot, 1 TB maximum capacity, providing a straight upgrade path for memory-bound workloads that have outgrown R540's bandwidth
Up to 16 × SFF or 8 × LFF — Hot-Swap SAS and SATA Up to 128 TB
16 × 2.5-inch SFF Hot-Plug — Maximum density configuration with 16 Small Form Factor hot-swap SAS/SATA bays; maximum raw capacity 122.88 TB using SAS SSDs; high bay count enables large all-SSD arrays for IOPS-intensive database, OLTP, and heavy virtualization workloads — more bays than any other 2U dual-socket in Dell's Gen 15 flagship line-up
8 × 3.5-inch LFF Hot-Plug — Eight Large Form Factor bays for SAS/SATA HDDs and SSDs; maximum raw capacity 128 TB using 16 TB SATA HDDs; LFF-optimized for high-capacity workloads including backup targets, file servers, NAS appliances, and archive tiers where sequential bandwidth per bay matters more than bay count
8 × 2.5-inch SFF Hot-Plug (Reduced Bay) — Eight SFF bays for SAS/SATA HDDs and SSDs; maximum 61.44 TB; entry storage configuration balancing bay count and cost for light virtualization and small business deployments not requiring 16-bay SFF density
3.5-inch LFF Drive Options — SATA 6 Gb/s HDDs at 7.2K RPM: 2 TB, 4 TB, 8 TB, 12 TB, 16 TB; SAS 12 Gb/s HDDs at 7.2K RPM: 2 TB, 4 TB, 8 TB, 12 TB, 16 TB; SAS drives add dual-port backplane redundancy and higher sustained sequential throughput compared to SATA equivalents at similar capacity points
2.5-inch SFF Drive Options — SAS HDDs: 10K RPM (600 GB, 1.2 TB, 2.4 TB) and 15K RPM (900 GB); SAS SSDs 12 Gb/s: 480 GB, 800 GB, 960 GB, 1.6 TB, 1.92 TB, 3.84 TB, 6.4 TB, 7.68 TB; SATA SSDs 6 Gb/s: 480 GB, 960 GB, 1.92 TB, 3.84 TB — match endurance class (RI vs MW vs HE) to workload write intensity
Boot and M.2 Storage — M.2 SATA SSDs (240 GB, 480 GB) for the BOSS-S2 boot module; microSD (16 GB, 32 GB, 64 GB) for IDSDM; neither BOSS-S2 nor IDSDM competes with data bay bandwidth — OS and hypervisor I/O is fully isolated from application storage at the backplane level
External JBOD Expansion — HBA355e external SAS 12 Gb/s connects to Dell MD/ME-Series JBODs and external tape libraries; supports up to 240 drives via SAS expanders — enables scale-out archival and backup capacity from the R550 without chassis replacement
PERC H755 to S150 — 15G RAID Stack with Slot-Free Front PERC Option
PERC H755 (Premium RAID) — 12 Gb/s SAS on PCIe Gen 4 with NV Flash-Backed write cache; supports RAID 0, 1, 5, 6, 10, 50, and 60; NV cache absorbs burst writes and persists data across power failure events — required for database transaction log protection, ERP write-intensive workloads, and RAID 6 parity configurations with high write pressure
PERC H745 (Value Performance RAID) — 12 Gb/s SAS with write cache on PCIe; supports RAID 0, 1, 5, 6, 10, 50, and 60; mid-tier between H755 and entry RAID — suited for virtualization and moderate-intensity database environments that need parity RAID protection with write caching at a lower cost than H755
PERC H355 Front PERC — No PCIe Slot Consumed — 12 Gb/s SAS front PERC controller in a dedicated small form factor integrated slot on the system board; supports RAID 0, 1, and 10; zero impact on the four user PCIe expansion slots — critical advantage for R550 configurations that need both a RAID controller and multiple high-bandwidth PCIe add-in cards simultaneously
PERC H345 (Entry Hardware RAID) — 12 Gb/s SAS entry controller on PCIe Gen 4 without write cache; supports RAID 0, 1, and 10; appropriate for read-dominant workloads, test and development environments, and configurations where investment in write-back caching is not justified by write I/O patterns
HBA355i (Internal Pass-Through) — 12 Gb/s SAS HBA on PCIe Gen 4 with no RAID logic; OS-managed ZFS, software RAID, or hypervisor storage drivers control data protection; suitable for vSAN, Storage Spaces Direct, and Ceph configurations that manage redundancy above the hardware layer
PERC H840 and HBA355e (External) — H840 external RAID connects to MD/ME JBODs with full RAID 0–60 and write cache support; HBA355e provides 12 Gb/s SAS pass-through to JBODs for OS-managed external storage pools; both options extend usable capacity beyond the 16 internal data bays without replacing the R550 chassis
PERC S150 (Software RAID) — SATA-only firmware-based RAID supporting 0, 1, 5, and 10; no additional PCIe overhead; lowest-cost controller for non-critical data, lab, and test environments where hardware RAID overhead is unwanted; RAID rebuild activity runs on the main Xeon Scalable processor — avoid S150 on fully loaded production systems
BOSS-S2 Mirrored M.2 Boot — OS Storage Independent of Data Drive Bays
BOSS-S2 Module (Primary Boot Option) — Boot Optimized Storage Solution S2 with dual M.2 SATA SSDs in hardware RAID 1 (mirrored); the BOSS-S2 is the 15G upgrade from the original BOSS module — it uses a dedicated integrated slot on the system board that does not consume any of the four user PCIe expansion slots or affect data backplane bandwidth
BOSS-S2 Drive Capacities — M.2 SATA SSDs available in 240 GB and 480 GB; both sizes are Read-Intensive rated with low daily write endurance; appropriate for OS images, hypervisor boot partitions, and small application installations — the BOSS RAID 1 mirror ensures a single M.2 SSD failure does not interrupt the server boot partition
BOSS iDRAC Integration — iDRAC9 monitors BOSS-S2 RAID member health continuously; alerts are raised when RAID degrades to a single M.2 drive before a second failure can expose data risk; the BOSS-S2 module mounts in a rear-accessible position enabling M.2 SSD replacement from outside the chassis without full disassembly
IDSDM (Internal Dual SD Module) — Dual microSD cards in hardware RAID 1 mirror as an alternative hypervisor boot option; supports 16 GB, 32 GB, and 64 GB microSD sizes; recommended for VMware ESXi and Citrix Hypervisor deployments where hypervisor vendors support SD-card boot media and write activity to the boot device is minimal
Internal USB 3.0 (Optional) — Optional internal USB 3.0 dongle (40 × 16 × 8 mm) installs inside the chassis for persistent in-chassis USB storage; suitable for hardware security keys, configuration media, and supplemental deployment tools that must remain physically inside the server without using any external USB port or PCIe slot allocation
Boot Device Architecture Note — BOSS-S2 is the preferred production choice for R550 OS and hypervisor boot; its dedicated M.2 SATA bandwidth operates completely independently of all SAS/SATA data drives and the OCP NIC — no I/O contention between OS boot reads and data workload traffic on the shared SAS backplane
3 × PCIe Gen 4 Slots + 1 × PCIe Gen 3 + OCP 3.0 — More Expansion Than Any Other Gen 15 1U
Config 0 — Full Dual-Riser (4 User Slots) — With dual-processor and both risers installed: Slot 1 (x16 Gen4, LP/HL, Processor 1), Slot 2 (x4 Gen3 via PCH, LP/HL), Slot 5 (x16 Gen4, LP/HL, Processor 2), Slot 6 (x16 Gen4, LP/HL, Processor 2); plus the integrated OCP 3.0 slot (Gen4 x16) — five simultaneous high-bandwidth connection points in a 2U chassis
Config 0-1 — Reduced Config (2 User Slots) — Used with the 16 × 2.5-inch SFF chassis without rear-riser; provides Slot 1 (x16 Gen4, Processor 1) and Slot 2 (x4 Gen3, PCH) only; trade-off between maximizing front drive bay count and PCIe expansion slot count — appropriate for all-SSD storage-dense configurations that need 16 bays more than extra PCIe cards
PCIe Gen 4 Slot Performance — Slots 1, 5, and 6 are PCIe Gen 4 x16 (LP/HL) operating at 16 GT/s — each provides 32 GB/s bidirectional bandwidth; Gen 4 doubles available bandwidth versus Gen 3 slots on the predecessor R540, enabling 25 GbE NIC cards, PCIe SSD AICs, and 32G Fibre Channel HBAs to operate without bandwidth saturation
OCP 3.0 Integrated Slot — One integrated OCP 3.0 NIC slot on PCIe Gen 4 x16 (additional to the 4 user slots); supports Intel, Broadcom, QLogic, Mellanox, and SolarFlare Small Form Factor cards at 1 GbE to 25 GbE; OCP 3.0 NIC connectivity does not consume Slot 1, 2, 5, or 6 — all four user slots remain available when the OCP slot is populated
Slot Width — LP HL — All user expansion slots accept low-profile half-length cards; the 2U chassis allows standard 1U rack-fit add-in cards from mainstream NIC and HBA vendors; verify card height (LP vs FH) before ordering — do not insert full-height cards into LP slots
100 GbE Capability — OCP 3.0 slot maximum port speed is 100 GbE per the OCP 3.0 Feature List; Intel and Mellanox 100 GbE cards (LP) supported in Slots 1, 5, and 6 for Config 0 — up to three independent 100 GbE connections when Slot 1, 5, and 6 are populated with 100 GbE NICs plus OCP 3.0
Dual 1 GbE LOM + OCP 3.0 Up to 25 GbE — PCIe Gen 4 on OCP Slot
Embedded Dual-Port 1 GbE LOM — Broadcom BCM5720 dual-port 1 GbE NIC (10/100/1000BASE-T) integrated on the Flex IO LOM board; both ports accessible on the rear panel; supports Wake-on-LAN, PXE network boot for OS provisioning, and iDRAC Shared LOM mode — enables iDRAC management to share a physical 1 GbE port when a dedicated management network is unavailable
Dedicated iDRAC9 Management Port — One dedicated RJ-45 iDRAC9 network port on the rear panel; independent of LOM data ports; use the dedicated port (iDRAC Enterprise/Datacenter license) to segregate out-of-band management traffic from production LAN/SAN traffic on separate VLAN-isolated management networks
OCP 3.0 Slot — Up to 25 GbE — One integrated OCP 3.0 NIC slot on PCIe Gen 4 x16 with maximum port speed of 100 GbE per OCP 3.0 specification; practical options include Intel, Broadcom, QLogic, Mellanox, and SolarFlare SFF cards at 1 GbE (4-port BT), 10 GbE (2–4 port BT or SFP+), and 25 GbE (2–4 port SFP28); Gen 4 doubles the per-lane bandwidth versus the R540's OCP 2.0 Gen 3 slot
10 GbE Options — Intel (SFP+, 2-port), Broadcom (BT 2-port, SFP+ 2-port), QLogic (BT 2-port, SFP+ 2-port, SFP+ 4-port); 10 GbE BT options provide wire-to-chassis connectivity without optical transceivers — suitable for iSCSI and NFS over existing Cat6 infrastructure; SFP+ options connect to 10 GbE ToR switches directly
25 GbE Options — Broadcom (SFP28 2-port and 4-port), Intel (SFP28 2-port), QLogic (SFP28 2-port), Mellanox (SFP28 2-port), SolarFlare (SFP28); 25 GbE provides 2.5× the bandwidth of 10 GbE without the cost or infrastructure change of 40 GbE/100 GbE — optimal for VM cluster traffic, iSCSI/NFS SAN fabric, and container overlay network workloads
PCIe Add-in NIC Cards — With Config 0 full riser, Slots 1, 5, and 6 can each hold a PCIe add-in NIC; combined with an OCP 3.0 NIC, R550 can run 4 simultaneous high-speed NIC connections — enough to independently segment management, iSCSI storage, NFS/SMB, and production VM traffic across dedicated physical interfaces
600 W to 1100 W — Platinum and Titanium Hot-Swap Redundant PSUs
600 W Mixed Mode 80 PLUS Platinum — Dual hot-swap PSU bays; 600 W per unit; 80 PLUS Platinum efficiency at 92% (20% load), 94% (50%), 90% (100%); auto-ranging 100–240 V AC / 240 VDC; suitable for single-socket, light-storage, standard 3.5-inch configurations that stay within 600 W per PSU under peak load
700 W Mixed Mode 80 PLUS Titanium — Dual hot-swap PSU bays; 700 W per unit at high-line (200–240 V AC / 240 VDC); Titanium efficiency at 90% (10%), 94% (20%), 96% (50%), 91% (100%); not available at 100 V low-line input — verify site power is ≥200 V AC before specifying Titanium PSU; highest per-watt efficiency available on R550
800 W Mixed Mode 80 PLUS Platinum — Dual hot-swap PSU bays; 800 W at both high-line and low-line; Platinum efficiency; recommended for dual-socket mid-configuration deployments with 8 × 3.5-inch drives and OCP NIC under full load; provides headroom above the minimum required by 165 W TDP CPUs plus storage under sustained utilization
1100 W Mixed Mode 80 PLUS Titanium — Dual hot-swap PSU bays; 1100 W at high-line, 1050 W at low-line; Titanium efficiency; maximum headroom for dual 165 W TDP processors, 16 fully populated DDR4 DIMMs, 16 × 2.5-inch SAS drives simultaneously, and dual 25 GbE add-in cards — chosen for feature-rich R550 configurations to prevent PSU from becoming a configuration limit
1100 W DC Hot-Swap (−48 V to −60 V) — Dedicated DC input PSU for data centers using −48 V DC power distribution common in telco and colocation environments; 1100 W at DC rail; same hot-swap form factor as AC units — enables PSU standardization in mixed AC/DC rack power configurations
1+1 Redundant Hot-Swap Design — Both PSU slots active simultaneously in 1+1 redundant configuration; the surviving PSU assumes full system load instantly on failure with no downtime; failed PSU is replaced hot with the system running; Dell's 1% power monitoring accuracy versus the industry-standard 5% enables tighter power cap settings for more effective rack power management
Upgrade from R540 — R540 maxed at 1100 W Platinum; R550 adds 700 W Titanium and 1100 W Titanium options — the Titanium tier (96% efficiency at 50% load) noticeably reduces data center energy costs over multi-year deployments at high average CPU utilization compared to R540's Platinum-only PSU stack
5-Fan Air Cooling with STD and HPR Heatsinks — ASHRAE A2/A3/A4 Certified
Fan Configuration — Up to five cold-swap fans across all chassis configurations (8 × 3.5-inch LFF, 16 × 2.5-inch SFF, and 8 × 2.5-inch SFF); five fans provide N+1 redundancy margin — the remaining fans automatically increase speed to compensate for a single fan failure, maintaining processor and DIMM temperatures within spec without service interruption
Standard vs. High Performance Heatsinks — STD heatsinks support configurations with processor TDP ≤150 W; High Performance (HPR) heatsinks are required for 165 W and 185 W TDP processors; the correct heatsink ships with the processor option ordered — HPR heatsinks replace STD when upgrading to higher-TDP Silver CPUs in existing R550 deployments
Dynamic Thermal Control — Open and Closed Loop — iDRAC9 closed-loop algorithm monitors real-time sensor data from processors, DIMMs, chipset, OCP NIC temperature, and individual drive temperatures; open-loop algorithm uses configuration inventory to determine minimum airflow requirements; the more aggressive of the two controls determines actual fan speed — maintaining lowest fan speed without compromising component thermal limits under variable workload intensity
ASHRAE A2 Standard Operation — Standard operating temperature: 10–35°C (50–95°F) below 900 m altitude; maximum operational altitude 3,048 m (10,000 ft) with −1°C derating per 300 m above 900 m; all processor, drive, and NIC options are validated for A2 environments — verify altitude derating for high-elevation data center deployments
ASHRAE A3 Extended Operation (5–40°C) — Available for equipment rooms without precision air conditioning; processor restricted to ≤150 W TDP; PCIe NIC cards with ≥25 W power not supported; BOSS-S2 M.2 module restrictions may apply — consult Dell EMC PowerEdge R550 Technical Specifications thermal restriction tables before A3 deployment to verify current component support list
ASHRAE A4 High-Ambient Operation (5–45°C) — High-ambient operation for colocation, telco, and open-aisle data centers without strict inter-row cooling; same configuration restrictions as A3 apply; aggressive derating at altitude — not all R550 drive and NIC configurations are A4 validated; verify against current Dell thermal restriction tables
Air Cooling Only — R550 supports forced-air cooling only; no direct liquid cooling, rear-door heat exchanger, or hybrid cooling options — all thermal management is convective airflow from front to rear; standard data center front-to-rear airflow racks are fully compatible
iDRAC Direct Front Access + USB 3.0 Rear + Dual VGA + Optional Serial
Front Panel — iDRAC Direct (Micro-AB USB) — Dedicated iDRAC Direct micro-USB port provides browserless iDRAC access at 169.254.0.1 from a laptop connected directly to the front panel; connect, configure BIOS and iDRAC settings, review hardware inventory, and clear iDRAC logs without a network connection — simplifies on-site provisioning in ROBO and new rack deployments
Front Panel — USB 2.0 and VGA — One USB 2.0 Type-A front port (0.5 A max) for KVM dongles and deployment media; one VGA port on the front panel for direct console keyboard-video access during provisioning without rear-panel access — a practical benefit for dense rack configurations where the chassis would otherwise need to be slid out for rear-panel VGA access
Rear Panel — USB 2.0 and USB 3.0 — One USB 2.0 (0.5 A max) and one USB 3.0 (0.9 A max) Type-A on the rear panel; USB 3.0 supports high-speed external storage, deployment drives, and backup media at up to 5 Gb/s; USB 2.0 serves KVM extenders and low-speed management peripherals
Rear Panel — Dual LOM + Dedicated iDRAC — Two RJ-45 1 GbE LOM ports for production data traffic; one dedicated RJ-45 iDRAC9 management port for out-of-band management; three rear Ethernet ports total — supports full separation of management, production, and storage network traffic with no OCP NIC required
Rear Panel — VGA and Optional Serial — One VGA port on the rear panel for standard console access; one optional DB-9 serial port for serial console logging, BIOS terminal access, and out-of-band management over serial concentrators and RS-232 devices — both operate without network access or OS availability
Internal USB 3.0 (Optional) — Optional internal USB 3.0 dongle (40 × 16 × 8 mm) installs inside the chassis; provides persistent in-chassis USB for security keys, hardware tokens, supplemental boot media, or configuration drives that must remain inside the server for physical security — does not use any PCIe slot or external port
Video Controller — Matrox G200 integrated video controller with 16 MB frame buffer; supports resolutions up to 1920 × 1200 at 60 Hz at standard color depths; available on front and rear VGA simultaneously — sufficient for remote console KVM and local crash cart console access without adding a GPU or PCIe video card
Silicon Root of Trust — Hardware-Anchored Cyber Resilient Architecture
Silicon Root of Trust — iDRAC9 firmware boot chain validation is anchored at the silicon level with immutable cryptographic keys in the processor die; no firmware in the boot chain can execute without passing the hardware root-of-trust verification — a tampered or replaced firmware is detected before it runs, preventing silent persistent malware in server firmware
Secured Component Verification — Factory-time cryptographic fingerprinting of all installed components; iDRAC9 verifies every component against the factory manifest at first boot; unauthorized component substitution during shipping or warehouse storage is detected and logged before the server enters production — critical for supply chain integrity assurance in regulated environments
Cryptographically Signed Firmware — Every firmware update package covering BIOS, iDRAC, PERC controllers, OCP NIC firmware, and all peripheral subsystem firmware carries a cryptographic signature; the system verifies each signature before applying any update — unsigned or tampered firmware bundles are rejected automatically regardless of delivery method
UEFI Secure Boot — OS bootloader and driver signatures validated at startup against the authorized database; prevents unsigned or revoked operating systems and boot-stage drivers from loading; required by PCI-DSS, HIPAA, FedRAMP, DISA STIG, and CIS Benchmark compliance frameworks that mandate boot integrity validation as a control
System Lockdown — Locks BIOS, iDRAC, and firmware configuration to prevent unauthorized changes; requires iDRAC9 Enterprise or Datacenter license; all lockdown override attempts are logged in the iDRAC event log; a physical presence check overrides lockdown for authorized recovery — hardens insider-threat and misconfiguration risk surface on production R550 deployments
TPM 1.2 / 2.0 and China NationZ TCM 2.0 — TPM 1.2 and TPM 2.0 supported; FIPS 140-2 and CC-TCG certified; hardware binding to the system board prevents TPM migration to unauthorized hardware; TPM 2.0 China NationZ (TCM 2.0) available for markets requiring Chinese Cryptography Standards compliance
System Erase and Secure Erase — iDRAC-managed secure wipe for HDDs, SSDs, and system RAM compliant with NIST 800-88 media sanitization guidelines; executed via Lifecycle Controller without an installed OS — used before decommissioning, redeployment to untrusted environments, or disposal to prevent data recovery from retired R550 components
iDRAC9 Out-of-Band Management — Full OpenManage Portfolio with Automation API
iDRAC9 License Tiers — iDRAC9 Express ships standard and provides sensor monitoring, alerting, and basic remote access; Enterprise adds dedicated NIC, virtual console/media, power capping, System Lockdown, and group management; Datacenter adds telemetry streaming, extended RESTful API scripting, and GPU management capabilities; all tiers available on the R550 platform
iDRAC Service Module (iSM) — Optional lightweight in-band agent running inside the host OS; extends iDRAC visibility into OS-level health metrics without requiring SSH access to iDRAC from the OS; iSM requires no additional license — runs on all supported operating systems listed in Chapter 11 of the Technical Guide
Lifecycle Controller — Embedded OS-agnostic provisioning engine; supports bare-metal firmware updates, BIOS and iDRAC configuration, driver deployment, full OS installation, and system inventory without an existing OS; all actions are logged for change management audit trails — enables field engineer provisioning without a PXE or deployment server
Redfish RESTful API — DMTF-standard Redfish RESTful API on iDRAC9; enables infrastructure-as-code provisioning, firmware lifecycle management, power capping, and sensor polling via curl, Python, PowerShell, Ansible, and Terraform; GitHub Scripting Libraries and RACADM CLI provide additional automation interfaces beyond REST
OpenManage Console Portfolio — OpenManage Enterprise (OME) for one-to-many server lifecycle management including firmware updates, alerts, and inventory; OpenManage Power Manager plugin for group power capping and energy analytics across racks; OpenManage SupportAssist plugin for predictive issue detection and automated case creation before problems escalate
Automation Platform Integrations — OpenManage Ansible Modules for idempotent playbook-based lifecycle management; OpenManage Integration for VMware vCenter (OMIVV) surfaces Dell iDRAC firmware management inside the vCenter UI; OpenManage Integration with ServiceNow (OMISNOW) creates ITSM incidents automatically from iDRAC hardware alerts; OpenManage Integration for Microsoft System Center (OMIMSSC) for Hyper-V environments
Quick Sync 2 Wireless Module — Optional BLE (Bluetooth Low Energy) wireless module for iDRAC configuration, inventory review, and alert notification via OpenManage Mobile on a smartphone; enables server discovery and initial IP configuration without network cable access to iDRAC — useful for staging, ROBO deployments, and remote site initial provisioning
Broad OS Compatibility — Windows Server, Linux, and VMware ESXi
Microsoft Windows Server with Hyper-V — Certified for Windows Server production and Hyper-V guest deployments; Windows WSSD software-defined storage configurations over iSCSI and SMB supported on 10 GbE / 25 GbE OCP NIC; dual-socket NUMA topology benefits Hyper-V vNUMA placement for latency-sensitive guest VM workloads
Red Hat Enterprise Linux (RHEL) — Full RHEL certification with Lifecycle Controller driver delivery; Ansible Modules for iDRAC integrate directly with RHEL-based GitOps pipelines; RHEL mdRAID supported alongside PERC hardware RAID for parallel OS and hardware data protection layers in the same deployment
SUSE Linux Enterprise Server (SLES) — Certified SLES support including High Availability Extension (HAE) for active/passive and active/active clustering; SLES GEO clustering for geographically distributed DR deployments; SLES driver stack delivered and updated through Dell's Lifecycle Controller integration
Canonical Ubuntu Server LTS — Ubuntu LTS certified for DevOps, Docker, Kubernetes, and cloud-native infrastructure; Ansible roles, Terraform providers, and Python clients for iDRAC RESTful API align with Ubuntu-based IaC and GitOps workflows; Ubuntu cloud-init supported for automated bare-metal provisioning through Lifecycle Controller
VMware ESXi — VMware ESXi certified for vSphere Essentials through Enterprise Plus; OMIVV surfaces Dell firmware lifecycle inside vCenter for one-console management; dual-socket R550 NUMA topology exposed to ESXi for vNUMA-aware VM placement; vSAN ReadyNode configurations supported for hyper-converged deployments on R550's large internal drive bay count
Citrix Hypervisor — Citrix Hypervisor certified for VDI and application delivery workloads; IDSDM microSD boot supported for Citrix deployments using SD-based hypervisor media; Citrix workloads benefit from R550's dual-socket density and OCP 3.0 25 GbE NIC options for VDA session delivery at scale
Lifecycle Controller Driver Delivery — Embedded driver packs in Lifecycle Controller firmware support OS installation for all six certified OS families without a PXE server or network-mounted ISO; guided deployment wizard walks through RAID and BIOS configuration, driver selection, and OS partition setup in a single integrated workflow
ReadyRails II + Stab-In Sliding Rails — Tool-Less 4-Post with CMA and SRB
Ready Rails II Sliding Rails — Supports Drop-in chassis installation into the rails; tool-less installation in 19-inch EIA-310-E compliant square or unthreaded round hole 4-post racks including all generations of Dell racks; tooled installation in threaded 4-post racks; supports full extension of the server out of the rack for full serviceability of internal components including drives, PSUs, risers, and DIMMs
Stab-In / Drop-In Sliding Rails — Supports both Drop-in and Stab-in installation methods; tool-less in square, unthreaded round, and threaded round hole 4-post racks; same full extension and serviceability support as Ready Rails II; CMA support; the outer CMA mounting brackets can be removed from the sliding rails to reduce rail depth and eliminate potential rear PDU clearance conflicts
ReadyRails Static Rails — Tool-less in square/unthreaded round hole 4-post racks; tooled in threaded 4-post and 2-post relay racks including Dell Titan and Titan-D rack frames; static rails do not extend and are not compatible with CMA or SRB — use for 2-post telco and branch IDF deployments or anywhere full slide-out serviceability is not required
Cable Management Arm (CMA) — Compatible with both sliding rail types (not static); tool-less side-swap from left to right without additional hardware — for single-PSU R550 configurations, mount CMA on the opposite side from the PSU bay for unobstructed PSU swap access; large U-shaped vent baskets with hook-and-loop straps retain and protect cables during full server slide-out service events
Strain Relief Bar (SRB) — Tool-less attachment to sliding rails; supports two depth positions to accommodate varying cable bundle sizes and rack depths; organizes cables into purpose-specific bundles (data, power, management) without CMA bulk — appropriate for dense rack configurations where CMA arm clearance conflicts with adjacent equipment
Chassis Depth and Weight — Depth: 685.78 mm with bezel (26.99 in); height: 86.8 mm (3.41 in / 2U); width: 482 mm (18.97 in); maximum system weights: 16 × 2.5-inch configuration 23.84 kg, 8 × 3.5-inch configuration 24.80 kg, 8 × 2.5-inch configuration 20.44 kg — verify floor load capacity for densely populated R550 rack deployments
R550 vs R540 — Gen 15 Upgrades in CPU, PCIe, Storage Density, and PSU Efficiency
Processor Platform — R550 advances to 3rd Gen Intel Xeon Scalable (Ice Lake-SP, LGA4189) from the R540's 2nd Gen Xeon Scalable (Cascade Lake, LGA3647); the 3rd Gen platform adds improved IPC, PCIe Gen 4 native integration, and increases maximum cores per socket from 20 (R540 Gold 6240R) to 24 (R550 Silver 5318Y)
PCIe Generation — Gen 4 vs Gen 3 — R550 provides 3 × x16 PCIe Gen 4 slots plus 1 × PCIe Gen 3 (x4 lane) and OCP 3.0 Gen 4; the R540's PCIe was limited to Gen 3 with lower per-slot bandwidth; Gen 4 doubles per-lane bandwidth at 16 GT/s versus 8 GT/s, enabling faster NVMe SSDs, 25 GbE NICs, and 32G Fibre Channel HBAs without bandwidth limitation
Storage Density — More Front Bays — R550 supports up to 16 × 2.5-inch SFF hot-plug bays (122.88 TB raw) versus the R540's maximum of 12 × 3.5-inch front bays (168 TB at LFF HDDs) plus optional 2 × 3.5-inch rear bays; the additional SFF front bay count in R550 enables more spindle-count IOPS from SAS drives while maintaining 128 TB LFF capacity option
OCP Upgrade — 3.0 Gen 4 vs LOM Riser Gen 3 — R550 integrates OCP 3.0 on PCIe Gen 4 x16 supporting up to 100 GbE; R540 used a proprietary LOM Riser supporting 1 GbE, 10 GbE BT, and 10 GbE SFP+ options at Gen 3 bandwidth; OCP 3.0 standardizes multi-vendor NIC compatibility while doubling available per-lane bandwidth to the integrated NIC slot
Storage Controllers — 15G vs 14G PERC — R550 uses 15G PERC family (H345, H355, H745, H755) on PCIe Gen 4 interfaces; R540 used 14G PERC (H330, H730P, H740P, HBA330) on Gen 3; the 15G H755 Harpoon controller adds NV Flash-Backed cache that persists across power-loss events, replacing the R540 H740P's capacitor-backed write cache
PSU Efficiency — Titanium Added — R550 adds 700 W Titanium and 1100 W Titanium options alongside Platinum variants; R540's PSU stack was Platinum only (495 W, 750 W, 1100 W); Titanium efficiency (96% at 50% load) reduces annual electricity cost noticeably over multi-year deployments compared to Platinum (94% at 50%) — a practical return on investment for 24/7 production systems
Memory Speed — R550 supports DDR4 RDIMM at 2933 MT/s (Xeon Silver); R540 was limited to 2666 MT/s with 2nd Gen Xeon Scalable; both platforms use 16 DIMM slots with 1 TB maximum capacity — the R550's memory bandwidth improvement benefits analytics and in-memory database workloads that saturated R540's DDR4 bus
| Feature | PowerEdge R550 (Gen 15) | PowerEdge R540 (Gen 14) |
|---|---|---|
| CPU Platform | LGA4189 — 3rd Gen Intel Xeon Scalable (Ice Lake-SP) | LGA3647 — 2nd Gen Intel Xeon Scalable (Cascade Lake) |
| Max Cores per Socket | 24 (Xeon Silver 5318Y) | 20 (Xeon Gold 6240R) |
| Memory Speed | DDR4 RDIMM up to 2933 MT/s | DDR4 RDIMM up to 2666 MT/s |
| Max Memory | 1 TB (16 × 64 GB RDIMM) | 1 TB (16 × 64 GB) |
| PCIe Generation | 3 × Gen 4 (x16) + 1 × Gen 3 (x4) | Gen 3 only |
| OCP Slot | OCP 3.0 (PCIe Gen 4 x16) | LOM Riser (PCIe Gen 3, proprietary) |
| Drive Bays (Max SFF) | 16 × 2.5-inch SFF (122.88 TB) | 12 × 3.5-inch front + 2 × 3.5-inch rear |
| RAID Controllers | PERC H345/H355/H745/H755 (15G, PCIe Gen 4) | PERC H330/H730P/H740P (14G, PCIe Gen 3) |
| Max PSU Efficiency | 1100 W 80 PLUS Titanium | 1100 W 80 PLUS Platinum |
| BOSS Module | BOSS-S2 (updated Gen 15 design) | BOSS (original) |
Frequently Asked Questions — Dell PowerEdge R550
The Dell PowerEdge R550 supports up to 1 TB of DDR4 ECC memory across 16 DIMM slots (RDIMM only) in a dual-socket 2U chassis — delivering up to 2933 MT/s DDR4 bandwidth across two NUMA nodes for in-memory database and virtualisation workloads.
The R550 supports up to 8 × 3.5-inch LFF drives or 16 × 2.5-inch SFF drives (SAS or SATA hot-swap). A BOSS-S2 dual M.2 RAID 1 boot module keeps OS storage completely independent of data drive bays.
The R550 uses a dual-socket platform supporting up to two 3rd Gen Intel Xeon Scalable processors (Ice Lake-SP, LGA4189), delivering up to 2 × 24 cores (48 physical cores / 96 threads). The 2U chassis provides four PCIe Gen 4.0 expansion slots for simultaneous RAID controllers, HBAs, and networking cards.
Yes. Express Computer Systems stocks professionally reconditioned Dell PowerEdge R550 rack servers tested and configured to your specifications. Configure a refurbished Dell R550 at ECS.
The R550 (Gen 15) replaces the R540 (Gen 14) with 3rd Gen Intel Xeon Scalable (Ice Lake-SP) vs 2nd Gen (Cascade Lake-SP), PCIe Gen 4.0 vs Gen 3.0, DDR4 up to 2933 MT/s vs 2666 MT/s, 700 W / 1100 W Titanium PSU options vs Platinum-only, and the new BOSS-S2 module replacing the original BOSS for more reliable OS boot.
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