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Dell PowerEdge R640 1U rack server silver front bezel eight drive bays

DELL

DELL PowerEdge R640 1U Rack Server 2x Xeon Gold 6148 20-Core 2.4GHz 256GB DDR4

SKU CH-HTSX-ZZSGF

1U rack server with dual 20-core Xeon Gold 6148 processors at 2.4 GHz, 256 GB DDR4 ECC memory, PERC H730P RAID controller, two 300 GB 10K SAS drives, quad-port 1/10 GbE networking, iDRAC9 Enterprise.

  • TypeRack
  • Rack Height1U
  • Redundant Hot-swap PowerYes
  • CPU TypeIntel Xeon
  • CPU Speed2.40 GHz
  • CPU SocketLGA 3647
  • Dual 20-core Xeon Gold 6148 CPUs deliver 40 total cores at 2.4 GHz base
  • 256 GB DDR4-2666 ECC memory across 8 DIMMs supports up to 3 TB capacity
  • PERC H730P 2 GB cache enables RAID 0/1/5/6/10/50/60 with battery backup
  • Dual 750 W platinum PSUs plus iDRAC9 Enterprise provide redundant power and remote management
  • Four-port X520/I350 card adds 2× 1 GbE and 2× 10 GbE SFP+ connectivity

Dual-socket 1U compute node

The PowerEdge R640 packs two Xeon Gold 6148 20-core processors at 2.4 GHz with 3.7 GHz turbo into a 1U rack chassis. It ships with 256 GB of DDR4 2666 MHz registered ECC memory across eight 32 GB modules. A PERC H730P 2 GB controller manages SAS and SATA drives with RAID 0, 1, 5, 6, 10, 50, 60 and pass-through modes. Dual 750 W platinum power supplies and iDRAC9 Enterprise remote management complete the dense scale-out platform.

Suits virtualisation clusters and database nodes

This server fits workloads that need high core counts, redundant power and integrated 10 GbE plus 1 GbE networking in a single rack unit. Buyers who need more than 24 DIMM slots or more than 3 TB of memory should look at larger platforms. Environments requiring only a single processor or non-redundant power will find the configuration overspecified. The 2.5-inch drive bays limit raw capacity compared with 3.5-inch alternatives.

256 GB DDR4 2666 MHz registered ECC memory

The installed 256 GB across eight 32 GB modules occupies eight of 24 slots and runs at 2666 MHz. This capacity and speed combination determines how many virtual machines or database instances the node can support before a memory upgrade is required.

Highlights

  • Dual 20-core Xeon Gold 6148 CPUs deliver 40 total cores at 2.4 GHz base
  • 256 GB DDR4-2666 ECC memory across 8 DIMMs supports up to 3 TB capacity
  • PERC H730P 2 GB cache enables RAID 0/1/5/6/10/50/60 with battery backup
  • Dual 750 W platinum PSUs plus iDRAC9 Enterprise provide redundant power and remote management
  • Four-port X520/I350 card adds 2× 1 GbE and 2× 10 GbE SFP+ connectivity

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 Size256GB
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

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Questions about this item

How many memory slots remain free for future DDR4 upgrades?

The server provides 24 DDR4 slots total, with eight occupied by the installed 32GB modules, leaving the remaining slots available for expansion toward the 3TB maximum.

Which component sets the ceiling on storage throughput during sustained write workloads?

The PERC H730P controller with its 2GB cache and 12Gb/s SAS interface governs the maximum sustained write speed to the installed 300GB 10K SAS drives.

What is the typical power draw and acoustic profile when both 750W platinum supplies run continuously?

Dual 750W platinum power supplies share the load efficiently, and the 1U chassis uses variable-speed fans that ramp with CPU temperature to manage heat and noise.

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