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Silver 1U rack server front with eight 2.5-inch drive bays and bezel

DELL

DELL PowerEdge R640 1U Rack Server 2x Xeon Gold 6148 2.4GHz 20 Core 256GB DDR4 8x 600GB SAS H730P

SKU CH-4W81-A1AEJ

Dual 20-core Xeon Gold 6148 2.4GHz server with 256GB DDR4, PERC H730P RAID and eight 600GB SAS drives in a 1U rack chassis

  • ProcessorIntel Xeon
  • Installed RAM256 GB
  • Video RAM8 MB
  • Installed SSDNo
  • ChipsetIntel C620
  • Processor core count20-Core Processor
  • Dual Xeon Gold 6148 processors deliver 40 total cores for heavy workloads
  • 256GB DDR4 2666MHz ECC memory supports large datasets and virtualization
  • PERC H730P controller enables RAID 0/1/5/6/10/50/60 with 2GB cache
  • Eight 600GB 10K SAS drives provide fast redundant storage in 2.5" bays
  • Dual 750W platinum PSUs and iDRAC9 Enterprise ensure uptime and remote control

Dense 1U dual-socket server

The PowerEdge R640 fits two Xeon Gold 6148 processors and 256GB of DDR4 ECC memory into a single rack unit. It targets operators who need maximum compute density for virtualisation, database or high-performance workloads without expanding rack footprint.

Replaces older 2U or single-socket platforms

Moving from a larger chassis or a single-CPU server to this 1U dual-socket design doubles core count to 40 while halving rack space. The jump is worth it when licence costs scale per socket and density drives total cost of ownership.

Sustained load behaviour

Redundant 750W platinum power supplies and hot-swap cooling keep both CPUs at 2.4GHz base clock under continuous multi-threaded demand. The H730P controller with 2GB cache maintains consistent RAID throughput across the eight 600GB 10K SAS drives during extended write-heavy runs.

How it compares

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

Price $1,751.99
Typical for this category: the median of 17,641 items is $1,910.99.
Installed RAM 256 GB
Higher than about 60% 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 RAM256 GB
Type of memoryDDR4
Maximum RAM capacity3 TB
Memory slot count24
Storage
Installed SSDNo
Disk controllerDell Perc H730P 2 GB Controller
Drive interfaceSAS
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

What rack-mount hardware is included for this 1U server?

The system ships with Dell Ready Rails and a front bezel for installation in a standard four-post rack cabinet.

How are the two Xeon Gold 6148 processors installed, and what is the common mistake?

Both CPUs come pre-installed in the dual LGA 3647 sockets; the error buyers make is ordering extra processors when the board already supports the maximum of two.

What maintenance will the PERC H730P controller need over time?

The RAID controller includes a 2GB cache module backed by a battery that will eventually require replacement to preserve write-cache protection during power loss.

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