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Dell PowerEdge R940 3U rack server front view with bezel and drive bays

DELL

DELL PowerEdge R940 3U Rack Server 4x Xeon Gold 6142 2.6GHz 16-Core 256GB DDR4 2x 800GB SSD

SKU CH-XMJ4-QP9FC

A 3U rack server with four 16-core Xeon Gold 6142 CPUs, 256GB DDR4 ECC memory and dual 800GB SSDs on a PERC H730P controller

  • TypeRack
  • Rack Height3U
  • Redundant Hot-swap PowerYes
  • CPU TypeIntel Xeon
  • CPU Speed2.60 GHz
  • CPU SocketLGA 3647

Installed Memory Size 256GB

SSD (Installed) 2 x 800GB SATA SSD

Struck-through versions exist but are not stocked here.

CPU Model Gold 6142

  • Four Xeon Gold 6142 processors deliver 64 total cores for heavy compute workloads
  • 256 GB DDR4 registered ECC memory across eight 32 GB modules supports large datasets
  • PERC H730P controller enables RAID 0, 1, 5, 6, 10, 50, 60 with 2 GB cache
  • Dual 800 GB SATA SSDs provide fast boot and application storage
  • Redundant 1600 W platinum power supplies and iDRAC 9 Enterprise ensure uptime and remote management

Mission-critical compute density

The Dell PowerEdge R940 is a 3U rack server built for mission-critical workloads that demand maximum processor density. Four Intel Xeon Gold 6142 processors deliver 64 total cores at a 2.6 GHz base frequency with 3.7 GHz turbo capability. The system ships with 256 GB of DDR4-2666 registered ECC memory across eight 32 GB modules, leaving 40 slots open for expansion up to 6 TB.

Scaling from dual-socket limits

This platform replaces dual-socket servers when thread count, memory capacity or I/O lanes become the bottleneck. The four-socket design removes the need to cluster smaller nodes for in-memory databases, large virtualisation hosts or real-time analytics. The jump is worth it when licensing costs favour fewer sockets or when a single OS image must address the full 6 TB memory ceiling.

Rack-ready integration

The chassis occupies 3U and includes eight 2.5-inch drive bays, currently populated with two 800 GB SATA SSDs behind a PERC H730P controller supporting RAID 0, 1, 5, 6, 10, 50 and 60. Networking is handled by an Intel X520/I350 daughter card providing two 10 Gb SFP+ and two 1 GbE ports. Dual 1600 W platinum power supplies and iDRAC 9 Enterprise enable remote management and redundancy without extra cabling. Rails and a front bezel are included for immediate rack mounting.

Highlights

  • Four Xeon Gold 6142 processors deliver 64 total cores for heavy compute workloads
  • 256 GB DDR4 registered ECC memory across eight 32 GB modules supports large datasets
  • PERC H730P controller enables RAID 0, 1, 5, 6, 10, 50, 60 with 2 GB cache
  • Dual 800 GB SATA SSDs provide fast boot and application storage
  • Redundant 1600 W platinum power supplies and iDRAC 9 Enterprise ensure uptime and remote management

Specifications

BrandDELL
SeriesPowerEdge R940
ModelR940
TypeRack
Rack Height3U
Redundant Hot-swap PowerYes
CPU TypeIntel Xeon
CPU Speed2.60 GHz
CPU SocketLGA 3647
Number of CPU Cores16-Core Processor
# of Processors Installed4
MAX Processors4
ChipsetIntel C620
Installed Memory Size256GB
Memory TypeDDR4
Max Memory Capacity6TB
Number of Memory Slots48
Storage ControllerDell Perc H730P 2GB Controller
HDD InterfaceSATA
SSD (Installed)2 x 800GB SATA SSD
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 13 PCIe Gen 3 Slots, 3x PCIe x8, and 10 x PCIe 3.0 x16 slots
Management PortRJ 45
Operating SystemNo
Features8 x 2.5" SATA/SAS Hot-Plug Drive Bays

Other versions of this model

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Questions about this item

What rack depth and rail kit does the 3U PowerEdge R940 require?

The server occupies 3U of rack space and ships with Ready Rails for standard 4-post rack mounting.

How are the four Xeon Gold 6142 processors installed, and what step is often missed?

Each CPU seats in an LGA 3647 socket; the common oversight is not applying thermal paste evenly before locking the heatsink retention bracket.

When will the DDR4 memory or SSD storage need replacement?

The 256GB DDR4 2666MHz ECC modules and 800GB SATA SSDs are enterprise-grade; plan refresh cycles around workload wear indicators rather than a fixed interval.

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