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Wait – Do You Even Need Xeon 6?

It is 2026. Every vendor is pushing Xeon 6, E-cores, PCIe Gen5, and E3.S. But here is the uncomfortable truth: for a lot of enterprise workloads, a well-configured Xeon Scalable 4th Gen server at 60% of the cost of a Xeon 6 equivalent is the smarter buy. The Dell PowerEdge R660 is that server. Dual-socket, 32 DDR5 DIMMs, up to 12 NVMe drives, 3 PCIe slots – all in 1U, at a price point that leaves budget for storage and networking instead of chasing the latest silicon.

R660 vs R670: Where Your Money Actually Goes

What You Care About	R660 (4th Gen Xeon)	R670 (Xeon 6)	Our Take
Max cores per socket	56	144 (E-core) / 86 (P-core)	Unless you need 100+ cores in 1U, 56 cores is rarely the bottleneck
Memory speed	DDR5-4800	DDR5-6400	Noticeable for HPC and AI. Negligible for web, AD, general virtualization
Drive bays	8/10x 2.5-inch + 2 rear	8/16/20x E3.S Gen5	E3.S is the future. U.2 NVMe is cheaper today and works everywhere
PCIe	3x Gen4/Gen5	Multi Gen5 + dual OCP	If you need 100GbE + GPU + HBA in 1U, go R670. Otherwise, R660
Power (idle, dual CPU)	~200W	~220W	Too close to matter
Price delta	Baseline	+25-40%	This column decides it. That delta buys a lot of NVMe storage

What the R660 Gets Right

DDR5 across 32 DIMMs (8 TB max) – yes, on a 4th Gen platform, you still get DDR5. Up to 12 NVMe U.2 drives. PCIe Gen5 on latest motherboard revisions. The 2 rear 2.5-inch bays are underrated: boot drives that do not consume front-panel slots, keeping all 10 front bays for data. And the R660 is a known quantity – firmware is mature, drivers are established, every hypervisor and management tool has been tested against this platform for two years. In production, stability has real value.

Specifications

Component	R660
Form Factor	1U dual-socket
Processor	2x 4th Gen Intel Xeon Scalable (max 56 cores)
Memory	32 DDR5 DIMMs, up to 8 TB
Storage	8/10x 2.5-inch + 2 rear (SAS/SATA/NVMe)
NVMe	Up to 12 NVMe U.2
PCIe	3x PCIe Gen4/Gen5
GPU	Up to 2x 75W single-wide
Management	iDRAC9 Enterprise

The Jobs the R660 Does Best

Virtualization clusters where you already own VMware licenses: 56 cores x 2 = 112 vCPUs. More than enough for 1U. Most clusters run out of memory before CPU anyway.
Database servers needing dual-socket reliability without GPU: SQL Server, PostgreSQL, MySQL. 8 TB DDR5 handles all but the largest instances.
Branch office deployments: Battle-tested, globally available, ISV-supported. Where you cannot afford compatibility surprises.
Budget-constrained refreshes: 5 R660 nodes now beats 3 R670 nodes later – more redundancy, better workload isolation.