Dell PowerEdge R660 1U Rack Server

Dell PowerEdge R660 Specifications

The R660 is a 16th Generation (16G) Dell PowerEdge rack server supporting 4th Generation Intel Xeon Scalable processors (Sapphire Rapids) in a dual-socket configuration.

Specification	Details
Form Factor	1U Rack
Processors	1 or 2x 4th Gen Intel Xeon Scalable (Sapphire Rapids)
Max Cores	56 per socket, 112 threads total
Max TDP	350W per processor
Memory Slots	32x DDR5 (16 per CPU, 8 channels per CPU)
Max Memory	8 TB with 256 GB RDIMM modules
Memory Speed	Up to 4800 MT/s (1 DPC)
Drive Bays	8x2.5", 10x2.5", 14x E3.S, or 16x E3.S (chassis dependent)
SAS Speed	24 Gb/s SAS-4 (2x faster than previous gen)
RAID Controllers	S160 (SW), H355, H755, H965i (8 GB NV cache)
PCIe Slots	Up to 3 (mix of PCIe Gen 5 and Gen 4)
Network	Optional 2x 1GbE LOM + OCP 3.0 slot (up to 25GbE)
Management	iDRAC9 with Lifecycle Controller
Power Supply	Hot-swap 1+1 redundant (700W to 1800W, 6 options)
GPU Support	Up to 3x 75W single-width (NVIDIA T4, L4)
Boot Options	BOSS-N1 (M.2 NVMe RAID), Internal USB 3.0, PXE
Built-in Accelerators	Intel AMX, DSA, IAA, optional QAT
Dimensions	42.8mm (H) x 482mm (W) x 809mm (D)

The R660 is DDR5-only — no LRDIMM or Intel Optane Persistent Memory support. It is also a 2.5-inch and E3.S only platform; 3.5-inch drives are not supported (unlike the R650, which had a 4x3.5-inch option). The R660 chassis is 51mm deeper than the R650 (809mm vs 758mm) — verify rack depth compatibility before specifying.

R660 Chassis Options at Enterasource

The Dell R660 is available in multiple chassis configurations, each optimized for different storage profiles.

Chassis	Front Drive Bays	Rear Bays	Max Raw Capacity	Best For
8x2.5-inch SFF	8x 2.5" SAS/SATA/NVMe	None	122.88 TB	Compute-focused with moderate storage
10x2.5-inch SFF	10x 2.5" SAS/SATA/NVMe	Up to 2x 2.5" rear	184.32 TB (front + rear)	Balanced compute and storage in 1U
14x E3.S NVMe	14x E3.S Gen5 NVMe	None	179.2 TB	Next-gen NVMe storage density
16x E3.S NVMe	16x E3.S Gen5 NVMe	None	204.8 TB	Maximum NVMe density in 1U

All drives are hot-swappable. The E3.S chassis configurations use the next-generation Enterprise and Data Center SSD Form Factor (EDSFF), delivering higher bandwidth and better thermal characteristics than standard 2.5-inch NVMe drives in a 1U server.

Every R660 at Enterasource is configured to order. Select your chassis, processors, DDR5 memory, drives, RAID controller, and networking, then our team assembles, tests, and ships your server with a 2-year warranty and free ground shipping to the lower 48 states.

Dell R660 vs R650 — 16th Gen vs 15th Gen

The R650 is the direct 15th Generation predecessor to the R660 in Dell's 1U rack server lineup.

Feature	R660 (16th Gen)	R650 (15th Gen)
Processors	4th Gen Xeon Scalable (Sapphire Rapids)	3rd Gen Xeon Scalable (Ice Lake)
Max Cores Per CPU	56	40
Max TDP	350W	270W
Memory Type	DDR5	DDR4
Max DDR Speed	4800 MT/s	3200 MT/s
Max RAM	8 TB (RDIMM)	2 TB (RDIMM) / 8 TB (LRDIMM)
PCIe Generation	Gen 5 (up to 2 slots) + Gen 4	Gen 4 only
PCIe Lanes Per CPU	80	64
SAS Speed	24 Gb/s (SAS-4)	12 Gb/s (SAS-3)
Drive Bay Options	8x/10x 2.5" or 14x/16x E3.S NVMe	4x 3.5", 8x/10x 2.5"
3.5-inch Drives	Not supported	4x 3.5" option available
E3.S NVMe	Up to 16x Gen5	Not supported
RAID Controllers	PERC H965i, H755, H355	PERC H745, H755, H345
BOSS Card	BOSS-N1 (M.2 NVMe)	BOSS-S1/S2 (M.2 SATA)
Security	Secured Component Verification, Data at Rest Encryption	Standard
Chassis Depth	809 mm (51mm deeper)	758 mm

Choose the R660 when you need PCIe Gen 5 bandwidth, DDR5 performance, E3.S Gen5 NVMe support, or more than 40 cores per socket. Choose the R650 when you need 3.5-inch drive bays, Intel Optane Persistent Memory, or a shallower chassis depth for space-constrained racks.

Dell R660 vs R760 — 1U vs 2U in 16th Gen

The Dell PowerEdge R760 is the 2U counterpart to the R660, sharing the same 16th Generation Intel Xeon Scalable platform.

Feature	R660 (1U)	R760 (2U)
Form Factor	1U Rack	2U Rack
Processors	4th Gen Xeon Scalable, up to 56 cores	Same
DIMM Slots / Max RAM	32 slots, up to 8 TB DDR5	32 slots, up to 8 TB DDR5
Max Front Drive Bays	10x 2.5" or 16x E3.S NVMe	24x 2.5" or 12x 3.5"
3.5-inch Drives	Not supported	12x 3.5" option
PCIe Slots	Up to 3 (Gen 4 + Gen 5)	Up to 8 (Gen 4 + Gen 5)
GPU Support	Up to 3x 75W single-width only	Up to 2x 350W double-width or 6x 75W single-width
Max PSU Wattage	1800W	2800W
Rack Density	42 servers per 42U rack	21 servers per 42U rack

Choose the R660 when rack density is the priority — virtualization farms, web clusters, and compute-dense deployments where every rack unit counts. The R660 also supports E3.S Gen5 NVMe for next-generation storage performance in 1U. Choose the R760 when you need double-width GPU support, 3.5-inch drives, more than 10 drive bays, or extensive PCIe expansion.

Why Buy a Refurbished Dell PowerEdge R660

The R660 is a current-generation 16th Gen server, and the refurbished market for this model is still developing. Fewer vendors carry R660 inventory than 14th Gen models, which means Enterasource can offer availability and pricing that larger marketplaces cannot match.

Every R660 goes through Enterasource's multi-point testing process: hardware diagnostics on all components, firmware verification, and a final systems check. Each server is backed by a 2-year Enterasource warranty with direct support from our team in Irvine, California.

As a configure-to-order seller, Enterasource lets you spec exactly the R660 you need — chassis, processors, DDR5 memory, drives, RAID controller, and networking. We assemble it, test it, and ship it with free ground shipping to the lower 48 states.

Browse all Dell PowerEdge servers available at Enterasource.

Frequently Asked Questions

What generation is the Dell R660?

The Dell PowerEdge R660 is a 16th Generation (16G) server. It uses 4th Generation Intel Xeon Scalable processors (Sapphire Rapids). The 15th Gen predecessor is the R650.

How much does a refurbished Dell R660 cost?

Pricing for a refurbished Dell PowerEdge R660 depends on the chassis configuration, processor selection, DDR5 memory capacity, storage, and networking options. As a 16th Gen server, the R660 is newer to the refurbished market with limited availability. Enterasource builds every R660 to order with a 2-year warranty and free ground shipping to the lower 48 states.

What is the difference between the Dell R660 and R650?

The R660 is the 16th Gen successor to the 15th Gen R650. Key upgrades: 4th Gen Xeon Scalable with up to 56 cores (vs 40), DDR5 at 4800 MT/s (vs DDR4 at 3200 MT/s), PCIe Gen 5, 24 Gb/s SAS-4, NVMe-based BOSS-N1 boot, and E3.S Gen5 NVMe support (up to 16 drives). The R660 dropped 3.5-inch drive support and Intel Optane Persistent Memory. It is also 51mm deeper than the R650 (809mm vs 758mm).

What is the difference between the Dell R660 and R760?

Both are 16th Gen servers with the same processor family, DDR5, and PCIe Gen 5. The R660 is 1U with up to 10x 2.5-inch drive bays (or 16x E3.S NVMe) and 3 PCIe slots, supporting only 75W single-width GPUs. The R760 is 2U with up to 24x 2.5-inch or 12x 3.5-inch drive bays and 8 PCIe slots, supporting 350W double-width GPUs. Choose the R660 for rack density. Choose the R760 for GPU workloads, 3.5-inch drives, and storage capacity.

Is the Dell R660 compatible with VMware ESXi?

Yes. The R660 is on the VMware Hardware Compatibility List and supports current ESXi versions. It includes Intel VT-x and VT-d for hardware-assisted virtualization, 32 DDR5 DIMM slots for up to 8 TB RAM, and BOSS-N1 NVMe boot to keep the hypervisor separate from data drives. The R660 is also compatible with Microsoft Hyper-V, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, and Canonical Ubuntu Server. Note: Citrix Hypervisor is not officially supported on 16th Gen PowerEdge.

Is the Dell R660 compatible with Proxmox VE?

Yes. Proxmox VE runs on Debian Linux, which is compatible with R660 hardware. The 4th Gen Intel Xeon Scalable processors include VT-x and VT-d for KVM/QEMU virtualization. With up to 112 threads, 8 TB DDR5 RAM, and E3.S Gen5 NVMe support, the R660 delivers high virtualization density in a 1U form factor. iDRAC9 provides hardware monitoring independent of the guest OS. Proxmox VE is licensed per socket rather than per core, so a dual-socket R660 needs one 2-CPU subscription whether it carries 16-core or 56-core processors — Enterasource is an authorized Proxmox reseller and quotes the subscription with the hardware.

Does the Dell R660 support 3.5-inch drives?

No. The R660 is a 2.5-inch and E3.S only platform. Dell dropped 3.5-inch drive support on the R660. The R650 (15th Gen predecessor) had a 4x3.5-inch chassis option. If you need 3.5-inch drives in a single rack unit, the cost-optimized Dell PowerEdge R660xs is the 16th Gen answer — it takes four 3.5-inch front bays in the same 1U form factor. For more than four 3.5-inch drives, step up to the 2U Dell PowerEdge R760 (up to 12x 3.5-inch front bays).