Dell PowerEdge R660XS Specs and Features
Meet the PowerEdge R660xs
Compact 1U dual-socket rack server purpose-built for balanced compute and dense storage in air-cooled data centers
Supports up to two 4th Gen Intel Xeon Scalable (Sapphire Rapids) processors — up to 32 cores per socket, 64 cores total
16 DDR5 DIMM slots supporting up to 1 TB max memory at speeds up to 4800 MT/s
Up to 10 x 2.5-inch front drive bays or 4 x 3.5-inch large-form-factor bays — SAS, SATA, and NVMe up to 153.6 TB
PCIe Gen5 I/O — up to 3 low-profile expansion slots for high-throughput networking and storage cards
OCP 3.0 networking slot at PCIe Gen4 x8 — supports up to 25 GbE per port, 4 ports
Air-cooled design — fits existing data center infrastructure without liquid cooling upgrades (ASHRAE A2/A3/A4 compliant)
1% power monitoring accuracy — 5x better than the industry-standard 5%, enabling precise power capping and efficiency management
Built for Balanced Compute and Scale-Out Workloads
Virtualization / Cloud — dual CPUs and up to 1 TB DDR5 RAM handle demanding VM sprawl in a single 1U chassis
Scale-Out Database — fast DDR5 memory at 4800 MT/s and NVMe storage eliminate I/O latency in database tiers
High Performance Compute (HPC) — up to 64 cores and PCIe Gen5 bandwidth power compute-intensive scientific and analytics workloads
Enterprise Applications — ERP, CRM, and business-critical middleware benefit from dual-socket reliability and high memory bandwidth
Mixed Workload Standardization — flexible 3.5" LFF or 2.5" SFF drive configurations make one chassis serve storage-heavy and compute-heavy roles
Air-Cooled Deployments — ideal for data centers that can't accommodate liquid cooling infrastructure — ASHRAE A4 rated to 45°C ambient
Virtualization
Scale-Out Database
HPC
Enterprise Apps
Mixed Workloads
Air-Cooled DC
4th Gen Intel Xeon Scalable — Sapphire Rapids
Up to two 4th Gen Intel Xeon Scalable (Sapphire Rapids) processors — socket count 1 or 2
Up to 32 cores per socket with Turbo Boost — top CPU: Xeon 6448Y at 2.2 GHz, 225 W TDP
4 x Intel UPI links at up to 16 GT/s — high-bandwidth multi-socket fabric (faster than 15G's 11.2 GT/s UPI)
80 PCIe Gen5 lanes per socket at 32 GT/s — doubles Gen4 bandwidth for storage and networking
DDR5 memory support up to 4800 MT/s (1DPC) — TDP range from 125 W (Xeon 3408U) to 225 W (Xeon 6448Y)
Built-in hardware accelerators for data analytics, cryptography, networking, storage, and data compression
Intel QuickAssist Technology (QAT) — hardware-accelerated compression and encryption at Sapphire Rapids silicon level
Supported SKUs: Xeon 6448Y, 6442Y, 6438Y+, 6426Y, 6414U, 5420+, 5418Y, 5416S, 5415+, 5412U, 4416+, 4410Y, 4410T, 3408U
DDR5 Memory — Up to 1 TB at 4800 MT/s
16 DDR5 DIMM slots (288-pin) — 8 per processor socket for balanced memory bandwidth
Max capacity: 1 TB with dual processors (16 x 64 GB RDIMMs); 512 GB with single processor
Speed: 4800 MT/s at 1 DIMM per channel (1DPC) — a significant step up from 15G DDR4 at 3200 MT/s
Supported speeds: 4000 MT/s, 4400 MT/s, and 4800 MT/s — speed determined by CPU SKU and DIMM count
Supports Registered ECC DDR5 (RDIMM) only — hardware error correction for data integrity under heavy loads
DIMM options: 16 GB, 32 GB, and 64 GB modules (Dell PN: 1V1N1, W08W9, J52K5) — do not mix capacities
Operating voltage: 1.1 V — lower than DDR4's 1.2 V for improved power efficiency per GB transferred
LFF or SFF — Up to 153.6 TB in a 1U Chassis
Up to 10 x 2.5-inch (SFF) front drive bays — SAS/SATA/NVMe HDD or SSD up to 153.6 TB
Up to 8 x 2.5-inch front bays in alternate SFF config — NVMe or SAS/SATA up to 122.88 TB
Up to 4 x 3.5-inch (LFF) front bays — SAS/SATA HDD up to 80 TB — ideal for high-capacity archive or backup tiers
Up to 2 x 2.5-inch rear bays — additional SAS/SATA/NVMe storage up to 15.2 TB
RAID controllers: PERC H965i (Premium, 24Gb SAS, 8 GB NV Cache), H755 / H755N, H355, HBA355i
External RAID: HBA355e — connect Dell MD-series 12 Gb JBOD enclosures for up to 240 drives
Software RAID: S160 — NVMe Gen4 RAID 0/1/5/10, no hardware controller required (Windows)
Supported drives: SAS SSDs up to 7.68 TB, NVMe Gen4 SSDs up to 15.63 TB, SATA HDDs up to 20 TB, SAS HDDs up to 20 TB
BOSS-N1: NVMe Boot — Free Every Data Bay
BOSS-N1 (Boot Optimized Storage Subsystem) — dedicated OS boot device using 2 x M.2 NVMe SSDs in hardware RAID 1
Frees all front drive bays 100% for application data — OS drive never competes for storage bandwidth
NVMe-based — major upgrade from BOSS-S1 (SATA M.2) used in previous gen — faster OS boot and file access
RAID controller: Marvell 88NR2241 — supports RAID 1 (mirrored) and RAID 0; if one M.2 fails, OS keeps running
Capacities: 480 GB, 960 GB standard; 1.92 TB (QNS) — 80 mm cold-swap M.2 form factor
Rear-facing placement — firmware updates controlled through iDRAC with full lifecycle logging
Internal USB 3.0 boot option also available — ideal for VMware ESXi or Hyper-V boot media
PCIe Gen5 Expansion — Up to 3 Low-Profile Slots
Up to 3 PCIe Low Profile (LP), Half Length (HL) expansion slots — all slots at PCIe Gen5 or Gen4
Single processor (1P): Up to 2 slots — 1x x16 Gen4 + 1x x8 Gen5 for maximum bandwidth
Dual processor (2P): Up to 3 slots — 1x x16 Gen4 + 2x x8 Gen4 OR 1x x16 Gen5 + 1x x8 Gen5
Multiple riser configurations: R1a, R1b, R2a, R2c, R2d, R2e — each optimized for specific workload and slot-count combinations
PCIe Gen5 doubles bandwidth vs Gen4 — 32 GT/s per lane, ideal for high-throughput NVMe HBAs and 100 GbE NICs
Supported add-in cards: Mellanox NDR200/NDR100, Broadcom and Intel 100/25/10 GbE NICs, QLogic FC32 HBAs, external PERC adapter
No hot-swap on PCIe slots — all card changes require system shutdown
Flexible Networking via Embedded LOM + OCP 3.0
2 x 1 GbE LOM (LAN on Motherboard) — embedded BCM controllers for base connectivity or shared iDRAC management
OCP 3.0 slot — PCIe Gen4 x8, up to 25 GbE per port with 4-port OCP cards (100 W total)
OCP port types: BT (BASE-T), SFP+, SFP28 — choose copper or optical for your cabling plant
Supported OCP vendors: Broadcom (1/10/25 GbE, 2 or 4 port) and Intel (25 GbE, 2 or 4 port)
OCP features: NC-SI, Wake on LAN, VLAN tagging, link aggregation, QoS, PXE boot
Dedicated iDRAC Ethernet port (rear RJ45) — out-of-band management on its own isolated network path
LOM and OCP cards can be installed simultaneously for maximum network redundancy and bandwidth
Hot-Swap Redundant PSUs — Up to 1800 W Titanium
Up to two redundant 60 mm hot-swap PSUs — 1+1 redundancy means no downtime on a single PSU failure
600 W Platinum — 100–240 VAC or 240 VDC; ideal for single-CPU, low-density configurations
700 W Titanium — 200–240 VAC or 240 VDC; 96% efficiency at high-line for energy-efficient single-CPU configs
800 W Platinum — 100–240 VAC or 240 VDC; 94% efficiency, widest voltage range for global deployments
1100 W Titanium — 100–240 VAC or 240 VDC; most common choice for dual-CPU mid-range R660xs configs
1400 W Platinum — 100–240 VAC or 240 VDC; for fully loaded dual-CPU + PCIe card configurations
1800 W Titanium — 200–240 VAC; maximum headroom for high-TDP CPU pairs and dense storage
1100 W LVDC (−48 to −60 VDC) — telecom and edge power plant environments; 27 A at 48 VDC input
Air-Cooled — Up to 7 Hot-Swap Fan Modules
Standard air cooling only — no DLC/liquid cooling option; designed to fit existing data center cooling infrastructure without modification
Up to 7 hot-swappable fans — 5 fans for 1-processor configs; 7 fans for 2-processor or 1-processor with rear storage module
Fan types: Standard (STD) for ≤185 W TDP CPUs; High Performance Gold (HPR/VHP) for higher TDP or NVMe/24Gb SAS configs
iDRAC-controlled closed-loop fan speed management — monitors CPU, DIMM, inlet, HDD, and OCP temps in real time
Supports ASHRAE A2 (10–35°C), A3 (5–40°C), and A4 (5–45°C) operational environments — compatible with edge and high-ambient deployments
Quiet mode at idle: 4.9 LwA (B) / 32 LpA (dB) — 1 CPU, 125 W, minimal drives at 25°C ambient
Max operational altitude: 3,048 m (10,000 ft); non-operational: 12,000 m (39,370 ft)
Front, Rear, and Internal I/O Ports
Front: 1 x iDRAC Direct (Micro-AB USB 2.0), 1 x USB 2.0, 1 x VGA (DB-15)
Rear: 1 x Dedicated iDRAC Ethernet (RJ45), 1 x USB 2.0, 1 x USB 3.0, 1 x VGA (DB-15), 1 x Serial (9-pin DTE, optional)
Rear NIC (LOM): 2 x 1 GbE RJ45 on system board, 1 x OCP 3.0 slot (Gen4 x8)
Internal: 1 x USB 3.0 (optional) — for hypervisor boot media; 1 x BOSS-N1 riser (M.2 NVMe)
iDRAC Direct (front Micro-USB) — connect a laptop directly for field management without network access
Dedicated rear iDRAC Ethernet — out-of-band management fully isolated from production traffic on its own port
Video: Matrox G200, 16 MB frame buffer — max resolution 1920×1200 @ 60 Hz, 32-bit color
Cyber Resilient Architecture — Zero Trust Built In
Silicon Root of Trust — hardware-anchored cryptographic boot verification from chip to OS; end-to-end supply chain integrity
Secured Component Verification (SCV) — validates hardware integrity from factory to deployment site with tamper detection
Cryptographically signed firmware — every firmware update is digitally verified before it can be applied
Secure Boot (UEFI) — blocks unauthorized OS loaders and rootkits at system startup
TPM 2.0 FIPS / CC-TCG certified — FIPS 140-2 compliant; China NationZ TPM option available for regional compliance
Data at Rest Encryption — Self-Encrypting Drives (SEDs) with local or external SEKM key management
Secure Erase — cryptographic drive sanitization for decommission and redeployment without data exposure
System Lockdown + MFA + RBAC — prevents unauthorized config changes; requires iDRAC9 Enterprise or Datacenter license
iDRAC9 Express + OpenManage — Full Lifecycle Control
iDRAC9 Express included by default — available before OS install, no software agent needed in the OS
iDRAC RESTful API with Redfish — industry-standard API plus Dell extensions for scripting, automation, and DevOps workflows
Zero Touch Provisioning (ZTP) — servers auto-configure on first network power-on using iDRAC without any manual steps
Quick Sync 2 wireless module (optional) — manage with OpenManage Mobile smartphone app anywhere on the data center floor
OpenManage Enterprise — centralized fleet-wide dashboard with plugins for Power Manager, Update Manager, SupportAssist, and CloudIQ
Integrations: VMware vCenter/vROps, Microsoft System Center, Red Hat Ansible, Terraform, ServiceNow, BMC TrueSight
Secure Connect Gateway (SCG) — automated proactive monitoring, issue detection, and support case creation at no additional charge
CloudIQ for PowerEdge — AI-driven predictive health analytics for fleet visibility from the cloud
Certified for Your Environment
Microsoft Windows Server with Hyper-V — virtualization-ready out of the box with full Microsoft certification
Red Hat Enterprise Linux (RHEL) — Tier-1 certified enterprise Linux for mission-critical deployments
SUSE Linux Enterprise Server (SLES) — full enterprise SUSE certification for SAP and HPC environments
Canonical Ubuntu Server LTS — popular enterprise Linux for cloud-native, container, and AI workloads
VMware ESXi / vSAN — industry-leading bare-metal hypervisor; full VMware HCL certification
OEM-ready version available — customize bezel, BIOS branding, and packaging for private label or cloud provider builds
See Dell.com/OSsupport for the full interoperability matrix across all certified OS and hypervisor versions
Standard 1U — Built for Dense Rack Environments
Height: 42.8 mm (1.69 inches) — standard 1U; max rack density in EIA-310-E 19-inch 4-post racks
Width: 482 mm (18.98 inches) — EIA standard 19-inch compliant; ear-to-ear width 434 mm (17.08 in)
Depth (10x 2.5" or 4x 3.5"): 677.1 mm (26.65 in) to rear wall; 712.95 mm (28.05 in) to PSU handle
Depth (8x 2.5" or no backplane): 626.42 mm (24.66 in) to rear wall — shorter chassis for tighter rack depths
Max weight: 19.45 kg (42.88 lbs) for 4x 3.5" config — 2-person lift recommended for configurations ≥40 lbs
A11 Stab-in/Drop-in Sliding Rails — tool-less for Dell Titan racks, EIA-310-E square/unthreaded round hole; supports optional CMA and Strain Relief Bar (SRB)
A8 Static Rails — 2-post and 4-post rack compatibility with wider rack support (screw head ≤10 mm)
Quick Resource Locator (QRL) label — scan with smartphone for instant product docs and iDRAC credentials
R660xs (Gen 16) vs Previous Gen — What's New
| Feature | R660xs (Gen 16) | Previous Gen (15G) |
|---|---|---|
| Processor | 4th Gen Intel Xeon Scalable (Sapphire Rapids) | 3rd Gen Intel Xeon Scalable (Ice Lake) |
| Memory Type | DDR5 up to 4800 MT/s | DDR4 up to 3200 MT/s |
| PCIe Generation | Gen5 (up to 80 lanes/socket) | Gen4 |
| CPU UPI Speed | Up to 16 GT/s (4 links) | Up to 11.2 GT/s |
| OCP Slot | OCP 3.0 (PCIe Gen4 x8) | OCP 2.0 (PCIe Gen3) |
| Boot Module | BOSS-N1 (NVMe M.2, Marvell 88NR2241) | BOSS-S1 (SATA M.2) |
| Premium PERC | PERC H965i (24Gb SAS, 8 GB NV Cache) | H755 (12Gb SAS) |
| Max SAS Speed | 24 Gb/s (with H965i) | 12 Gb/s |
| Built-in Accelerators | Analytics, crypto, networking, storage, compression | Limited |
| Power Monitoring | 1% accuracy (5x industry standard) | ~5% accuracy |
World-Class Support Wherever You Are
ProSupport Suite — 24/7 phone support with Next Business Day on-site parts and labor; upgrade to ProSupport Plus for proactive, AI-driven issue prevention
ProDeploy Infrastructure Suite — factory configuration, rack integration, and on-site deployment services with assigned project management
Zero Touch Provisioning — servers arrive pre-configured and auto-deploy on first power-on with no technician intervention
Secure Connect Gateway (SCG) — automated issue detection, case creation, and proactive alerts — included at no additional charge
Dell TechDirect — online self-service portal for parts dispatch, support cases, and deployment project tracking
Dell Upgrades Program — OEM-validated memory, storage, CPU, NIC, PSU, and rail kit upgrades for certified compatibility
APEX Flex on Demand — consume the R660xs as a service with billing that scales to actual workload usage
Available in 170+ countries with 60,000+ employees and partners for rapid on-site response worldwide
Frequently Asked Questions — Dell PowerEdge R660XS
The Dell PowerEdge R660XS supports up to 1 TB of DDR5 ECC memory across 16 DIMM slots (8 per socket) in a dual-socket 1U chassis running at up to 4800 MT/s — a high-density platform for virtualisation, databases, and enterprise workloads.
The R660XS supports up to 10 × 2.5-inch SFF hot-plug drives (SAS, SATA, or NVMe) or 4 × 3.5-inch LFF drives, with a BOSS-N1 bootflash module to free all data bays for application storage.
The R660XS supports up to two 4th Gen Intel Xeon Scalable processors (Sapphire Rapids, LGA4677) — up to 32 cores per socket (64 total) — delivering Gen 16 platform advantages including PCIe Gen 5.0 and Intel in-die accelerators in a compact 1U dual-socket chassis.
Yes. Express Computer Systems stocks professionally reconditioned Dell PowerEdge R660XS rack servers tested to your specifications. Configure a refurbished Dell R660XS at ECS.
The R660XS (Gen 16) upgrades the R650XS (Gen 15) with 4th Gen Intel Xeon Scalable (Sapphire Rapids) vs 3rd Gen (Ice Lake-SP), DDR5 vs DDR4 at higher bandwidth, PCIe Gen 5.0 vs Gen 4.0, Intel on-die accelerators (AMX, DSA, QAT), and iDRAC9 with OpenManage for advanced lifecycle management.
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