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Silver 3U rack server front with eight 2.5 inch drive bays and bezel

DELL

DELL PowerEdge R940 3U Rack Server 4x Xeon Gold 6142 2.6GHz 16-Core 768GB DDR4

SKU CH-RAER-9EYC8

A 3U rack server with four 16-core Xeon processors at 2.6GHz, 768GB DDR4 memory, H730P RAID controller, dual 10Gb SFP+ networking, iDRAC9 Enterprise and redundant 1600W power supplies

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

Installed Memory Size 768GB

HDD 2 x 300GB 10K SAS

CPU Model Gold 6142

  • Four 16-core Xeon Gold 6142 CPUs deliver 64 threads at 2.6 GHz
  • 768 GB DDR4 ECC memory across 24 slots supports large datasets
  • H730P RAID controller enables 0, 1, 5, 6, 10, 50, 60 levels
  • Quad-port X520/I350 card provides two 1 GbE and two 10 GbE SFP+ links
  • Dual 1600 W platinum supplies plus iDRAC9 Enterprise ensure uptime and remote control

Four-socket Xeon Gold server

The Dell PowerEdge R940 is a 3U rack server equipped with four Intel Xeon Gold 6142 processors, each running at 2.6 GHz with 16 cores and a 3.7 GHz turbo frequency. It ships with 768 GB of DDR4 2666 MHz registered ECC memory across 24 modules and includes a PERC H730P controller with 2 GB cache. Dual 1600 W platinum power supplies and iDRAC 9 Enterprise provide redundancy and remote management.

Upgrade from smaller dual-socket systems

This platform replaces dual-socket servers when workloads demand more than 64 cores or memory beyond typical two-socket limits. The jump is worth it for databases, virtualization clusters or analytics that scale across 64 cores and 768 GB of RAM. Buyers who need only single-thread speed or modest core counts will not use the extra sockets.

12 Gb/s SAS backplane and LGA 3647 socket limits

The storage controller supports SAS and SATA drives at 12 Gb/s, but the 2.5-inch bay count caps internal spindle devices at eight. Memory tops out at 6 TB across 48 slots, so further expansion requires higher-density DIMMs not included. The LGA 3647 socket and C620 chipset restrict future CPU upgrades to the same Scalable generation.

Highlights

  • Four 16-core Xeon Gold 6142 CPUs deliver 64 threads at 2.6 GHz
  • 768 GB DDR4 ECC memory across 24 slots supports large datasets
  • H730P RAID controller enables 0, 1, 5, 6, 10, 50, 60 levels
  • Quad-port X520/I350 card provides two 1 GbE and two 10 GbE SFP+ links
  • Dual 1600 W platinum supplies plus iDRAC9 Enterprise ensure uptime and remote control

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 Size768GB
Memory TypeDDR4
Max Memory Capacity6TB
Number of Memory Slots48
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 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 is required for the included ready rails?

The ready rails supplied with the server fit standard 3U rack openings; check your cabinet depth against the rail adjustment range before mounting.

What is the first step when installing the four Xeon Gold 6142 processors onto the LGA 3647 sockets?

Align each processor with the socket keying, lower it gently without force, then secure the load plate before applying thermal paste and attaching the heatsinks.

How many DDR4 memory slots remain free for future expansion beyond the 768GB installed?

The system has 48 DDR4 slots total; 24 are populated with 32GB modules, leaving 24 slots available for additional registered ECC memory up to the 6TB maximum.

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