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.
Frequently Asked Questions
What generation is the Dell R660?
The Dell PowerEdge R660 is a 16th Generation (16G) server, the latest generation of Dell PowerEdge 1U rack servers as of 2026. 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. Use the configurator on this page to select your components and request a quote. 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.
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. For a 16th Gen server with 3.5-inch drive bays, see the Dell PowerEdge R760 (2U, up to 12x 3.5-inch front bays).
Browse all Dell PowerEdge servers available at Enterasource.
