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

DELL

DELL PowerEdge R640 1U rack server 2x Xeon Gold 6142 2.6GHz 16-core 768GB DDR4 2x 400GB SSD H730P

SKU CH-4NTK-G3NMP

A 1U rack server with dual 16-core Xeon Gold 6142 CPUs, 768GB DDR4, dual 400GB SSDs and a PERC H730P controller

  • ProcessorIntel Xeon
  • Installed RAM768 GB
  • Video RAM8 MB
  • Installed SSD2 × 400 GB SATA SSD
  • ChipsetIntel C620
  • Processor core count16-Core Processor
  • Dual Xeon Gold 6142 CPUs deliver 32 cores at 2.6GHz with 3.7GHz turbo for heavy compute workloads
  • 768GB DDR4 ECC memory across 24 slots supports large in-memory databases and virtualization
  • PERC H730P 2GB controller provides RAID 0/1/5/6/10/50/60 with battery-backed cache for data protection
  • Two 400GB SATA SSDs give fast boot and application storage in hot-swap 2.5" bays
  • Intel X520/I350 quad-port card adds 2x 1GbE and 2x 10Gb SFP+ for flexible networking

Dense 1U Dual-Socket Platform

The Dell PowerEdge R640 is a 1U rack server built for dense scale-out deployments. It ships with two Intel Xeon Gold 6142 processors, each running at 2.6 GHz with 16 cores. The system includes 768 GB of DDR4 registered ECC memory across 24 slots and a PERC H730P storage controller with 2 GB cache.

Virtualisation Hosts and Scale-Out Clusters

This configuration suits environments that need high core counts and large memory capacity in a single rack unit. The dual 10 GbE SFP+ ports and quad 1 GbE interfaces support demanding network workloads. Buyers who require more than two processor sockets or additional drive bays beyond the eight 2.5-inch slots should evaluate alternative platforms.

768 GB DDR4 Registered ECC Memory

The installed 768 GB of DDR4 2666 MHz registered ECC memory occupies all 24 DIMM slots and determines the immediate capacity for virtual machines or in-memory databases. The platform supports up to 3 TB total when higher-capacity modules are used. Verify that your workload fits within this memory footprint before deployment.

How it compares

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

Price $3,351.99
Pricier than about 68% of the 17,641 comparable items (median $1,910.99).
Installed RAM 768 GB
Higher than about 90% 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 count16-Core Processor
Processor socketLGA 3647
ChipsetIntel C620
Processor speed2.6 GHz
Installed CPUs2
Max supported CPUs2
Memory
Installed RAM768 GB
Type of memoryDDR4
Maximum RAM capacity3 TB
Memory slot count24
Storage
Installed SSD2 × 400 GB SATA SSD
Disk controllerDell Perc H730P 2 GB Controller
Drive interfaceSATA
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

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Questions about this item

What comes in the box and what must I buy separately?

The server includes two Xeon Gold 6142 processors, 768GB DDR4 in all 24 slots, two 400GB SATA SSDs, a PERC H730P controller with battery, quad-port X520/I350 networking, iDRAC9 Enterprise, dual 750W PSUs, rails and bezel. Add drives for the remaining six 2.5" bays if needed.

Which memory configuration should I choose for this 768GB setup?

The 768GB ships as 24x 32GB DDR4 2666MHz registered ECC modules, filling every slot. To expand toward the 3TB maximum you must replace modules with higher-capacity DDR4 RDIMMs or LRDIMMs; there are no empty slots.

What does the 3.7GHz turbo figure mean once the server is running workloads?

Each 16-core Xeon Gold 6142 can boost from its 2.6GHz base to 3.7GHz when thermal headroom allows, giving short bursts of higher single-thread speed before returning to sustained all-core frequencies.

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