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Silver 1U rack server with front bezel, eight 2.5-inch drive bays and dual redundant power supplies

DELL

DELL PowerEdge R640 1U rack server 2x Xeon Gold 6148 2.4GHz 20-core 64GB DDR4

SKU CH-S3CM-D10KB

A 1U rack server with dual 20-core Xeon Gold 6148 CPUs, 64GB DDR4 ECC memory, PERC H730P RAID controller, quad-port 1GbE and 10Gb SFP+ networking, iDRAC9 Enterprise, and redundant 750W power supplies

  • ProcessorIntel Xeon
  • Installed RAM64 GB
  • Video RAM8 MB
  • Installed SSDNo
  • ChipsetIntel C620
  • Processor core count20-Core Processor
  • Dual 20-core Xeon Gold 6148 CPUs deliver 40 total cores for dense compute workloads
  • 64GB DDR4 2666MHz registered ECC memory supports error-corrected performance across 24 DIMM slots
  • PERC H730P 2GB controller enables RAID 0/1/5/6/10/50/60 with battery-backed cache
  • Quad-port X520/I350 card provides 2× 1GbE and 2× 10Gb SFP+ connectivity
  • iDRAC9 Enterprise plus dual 750W platinum PSUs ensure remote management and redundant power

Dense 1U dual-socket server

The Dell PowerEdge R640 is a 1U rack server fitted with two Intel Xeon Gold 6148 processors, each running at 2.4 GHz with 20 cores. It ships with 64 GB of DDR4 registered ECC memory across four 16 GB modules and includes a PERC H730P RAID controller with 2 GB cache. Eight 2.5‑inch SAS/SATA drive trays, quad-port networking and redundant 750 W power supplies complete the package.

Suited for scale-out workloads.

This platform targets dense virtualisation, database and high-performance computing clusters that benefit from 40 total cores in a single rack unit. Organisations needing GPU acceleration, more than eight front-accessible drive bays or a single-socket configuration should evaluate alternative platforms.

40 cores in 1U decides fit

The defining specification is the dual 20‑core Xeon Gold 6148 arrangement delivering 40 threads at 2.4 GHz base frequency within a 1U chassis. If the workload requires that core density in minimal rack space, this server matches; otherwise a different form factor or processor count is appropriate.

How it compares

Measured against everything we stock in Rack & Tower Servers, at today’s prices. Recalculated every night.

Price $755.99
Cheaper than about 84% of the 17,641 comparable items (median $1,910.99).
Installed RAM 64 GB
Lower than about 70% of the 15,103 comparable items (median 128 GB).
Video RAM 8 MB
Typical for this category: the median of 8,309 items is 0.01 GB.

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Specifications

Product
Brand nameDELL
Product linePowerEdge R640
Model nameR640
Product typeRack
Processor
ProcessorIntel Xeon
Processor core count20-Core Processor
Processor socketLGA 3647
ChipsetIntel C620
Processor speed2.4 GHz
Installed CPUs2
Max supported CPUs2
Memory
Installed RAM64 GB
Type of memoryDDR4
Maximum RAM capacity3 TB
Memory slot count24
Storage
Installed SSDNo
Disk controllerDell Perc H730P 2 GB Controller
Drive interfaceSATA/SAS
Supported RAID levelsRAID 0/1/5/6/10/50/60
Graphics
Video RAM8 MB
Graphics chipMatrox G200
Connectivity
Network controllerDell Intel X520/I350 Quad Port 2x 1GbE 2x 10Gb SFP+ Network Daughter Card
Ports & slots
Network ports4 x Ports
Expansion card slotsUp to 3 PCIe Gen 3 slots all x16
Management interfaceRJ 45
Power
Hot-swap redundant PSUYes
Size & build
Rack height1U
Software
Operating systemNo

Other versions of this model

5 more in the same range

Questions about this item

How do I install the Xeon Gold 6148 CPUs and what step is commonly missed?

Seat both LGA 3647 processors, apply thermal paste evenly, torque the heatsink screws in a cross pattern, then install all 64 GB of DDR4 2666 MHz registered ECC memory across the 24 slots; the step often missed is enabling the second CPU in BIOS before adding its memory channels.

What maintenance or replacement will the PERC H730P RAID controller need later?

The PERC H730P 2 GB controller uses a replaceable battery-backed write cache; plan to swap the battery module every 3 to 5 years to preserve RAID 0/1/5/6/10/50/60 data integrity during power loss.

What limit appears first under sustained full-load use?

The dual 750 W platinum power supplies set the thermal ceiling; continuous 20-core turbo at 3.7 GHz across both sockets can hit the 1U chassis cooling capacity before the CPUs reach their own throttle point.

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