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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 768GB DDR4 8x 1.2TB SAS H730P

SKU CH-WYY7-J2YWE

A 1U rack server with dual 20-core Xeon Gold 6148 CPUs, 768 GB DDR4, eight 1.2 TB SAS drives and a PERC H730P controller

  • TypeRack
  • Rack Height1U
  • Redundant Hot-swap PowerYes
  • CPU TypeIntel Xeon
  • CPU Speed2.40 GHz
  • CPU SocketLGA 3647
  • Dual 20-core Xeon Gold 6148 at 2.4 GHz deliver 40 threads for dense compute
  • 768 GB DDR4 2666 MHz ECC across 24 slots supports large in-memory workloads
  • PERC H730P 2 GB enables RAID 0/1/5/6/10/50/60 on 12 Gb/s SAS
  • Eight 1.2 TB 10K SAS drives provide high-IOPS storage in 2.5-inch bays
  • iDRAC 9 Enterprise plus X520/I350 quad-port 1/10 GbE give remote management and fast networking

Dense 1U dual-socket platform

The Dell PowerEdge R640 is a 1U rack server built for dense scale-out deployments. Two Xeon Gold 6148 processors deliver 40 cores at 2.4 GHz with 3.7 GHz turbo. 768 GB of DDR4 registered ECC memory fills all 24 slots. Eight 1.2 TB SAS drives connect through a PERC H730P controller supporting RAID 0, 1, 5, 6, 10, 50 and 60.

Suits virtualization farms, not GPU clusters

This configuration targets organizations running virtualization, container orchestration or memory-heavy databases that benefit from high core counts and large DRAM capacity in a single rack unit. The quad-port network daughter card provides two 1 GbE and two 10 Gb SFP+ links for flexible fabric integration. Buyers who require GPU acceleration or more than eight internal drive bays should consider larger chassis options.

768 GB DDR4 in 24 slots decides fit

The installed memory occupies every DIMM socket, leaving no room for expansion without removing modules. Maximum platform capacity reaches 3 TB, but achieving it requires replacing the current 32 GB sticks. Confirm that the fixed 768 GB baseline satisfies the working-set size of the intended workload before committing to this unit.

Highlights

  • Dual 20-core Xeon Gold 6148 at 2.4 GHz deliver 40 threads for dense compute
  • 768 GB DDR4 2666 MHz ECC across 24 slots supports large in-memory workloads
  • PERC H730P 2 GB enables RAID 0/1/5/6/10/50/60 on 12 Gb/s SAS
  • Eight 1.2 TB 10K SAS drives provide high-IOPS storage in 2.5-inch bays
  • iDRAC 9 Enterprise plus X520/I350 quad-port 1/10 GbE give remote management and fast networking

Specifications

BrandDELL
SeriesPowerEdge R640
ModelR640
TypeRack
Rack Height1U
Redundant Hot-swap PowerYes
CPU TypeIntel Xeon
CPU Speed2.40 GHz
CPU SocketLGA 3647
Number of CPU Cores20-Core Processor
# of Processors Installed2
MAX Processors2
ChipsetIntel C620
Installed Memory Size768GB
Memory TypeDDR4
Max Memory Capacity3TB
Number of Memory Slots24
Storage ControllerDell Perc H730P 2GB Controller
HDD InterfaceSAS
SSD (Installed)No
Raid LevelRAID 0/1/5/6/10/50/60
GPU TypeMatrox G200
Video Memory8MB
Ethernet ControllerDell Intel X520/I350 Quad Port 2x 1GbE 2x 10Gb SFP+ Network Daughter Card
LAN Ports4 x Ports
Expansion SlotsUp to 3 PCIe Gen 3 slots all x16
Management PortRJ 45
Operating SystemNo
Features8 x 2.5" SATA/SAS Hot-Plug Drive Bays

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How much power do the two 750 W PSUs draw when the dual Xeon Gold 6148 CPUs and 768 GB DDR4 run continuously?

Each supply is rated at 750 W with Platinum efficiency; actual draw depends on workload but the redundant pair shares the load.

Which cabling and transceivers are required to use the X520/I350 daughter card's 10 Gb SFP+ ports?

The card provides two 10 Gb SFP+ ports; you need compatible SFP+ transceivers and fibre or direct-attach cables matched to your switch.

Can the PERC H730P controller manage the eight 1.2 TB SAS drives together with older SATA SSDs in a mixed array?

The H730P supports SAS and SATA drives and RAID 0/1/5/6/10/50/60, so mixed SAS HDD and SATA SSD arrays are possible.

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