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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 2× Xeon Gold 6148 2.4 GHz 20-core 768 GB DDR4 8× 400 GB SSD H730P

SKU CH-9JA1-RJPMT

A 1U rack server with two 20-core Xeon Gold 6148 processors at 2.4 GHz, 768 GB DDR4, eight 400 GB SATA SSDs on a H730P controller and redundant 750 W power supplies

  • ProcessorIntel Xeon
  • Installed RAM768 GB
  • Video RAM8 MB
  • Installed SSD8 × 400 GB SATA SSD
  • ChipsetIntel C620
  • Processor core count20-Core Processor
  • Dual Xeon Gold 6148 CPUs deliver 40 cores at 2.4 GHz base and 3.7 GHz turbo
  • 768 GB DDR4 2666 MHz registered ECC memory across 24 slots supports heavy workloads
  • PERC H730P 2 GB controller enables RAID 0, 1, 5, 6, 10, 50, 60 with battery-backed cache
  • Eight 400 GB SATA SSDs give fast solid-state capacity in the 8-bay 2.5 inch chassis
  • iDRAC9 Enterprise plus quad-port 1 GbE and 10 GbE SFP+ networking provide full remote management

Dense scale-out platform

The Dell PowerEdge R640 is a 1U rack server built for dense scale-out data center computing. Two Intel Xeon Gold 6148 processors deliver 20 cores each at 2.40 GHz with 3.7 GHz turbo. The system ships with 768 GB of DDR4 2666 MHz registered ECC memory across 24 slots. It targets workloads that need high core counts and large memory in a single rack unit.

Storage and networking limits

The PERC H730P controller supports RAID 0, 1, 5, 6, 10, 50, 60 and pass-through with a 2 GB cache. Eight 400 GB SATA 6 Gb/s 2.5-inch SSDs occupy all front drive bays. Network connectivity uses an Intel X520/I350 daughter card providing two 1 GbE and two 10 Gb SFP+ ports. No additional internal drive bays or PCIe slots are available in this 1U chassis.

Pre-order checks

Verify that your rack accepts 1U depth and the included ready rails. Confirm the two 750 W platinum power supplies match your PDU connectors and voltage. Ensure iDRAC 9 Enterprise remote management integrates with your existing monitoring tools. The system supports a maximum of 3 TB DDR4 across 24 slots if future expansion is planned.

How it compares

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

Price $4,082.99
Pricier than about 72% 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 count20-Core Processor
Processor socketLGA 3647
ChipsetIntel C620
Processor speed2.4 GHz
Installed CPUs2
Max supported CPUs2
Memory
Installed RAM768 GB
Type of memoryDDR4
Maximum RAM capacity3 TB
Memory slot count24
Storage
Installed SSD8 × 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

Should I choose the eight 400 GB SSDs or add larger drives later?

Eight 400 GB SATA SSDs are factory installed; the PERC H730P controller supports SAS and SATA drives for future expansion.

What does the 2.4 GHz base clock with 3.7 GHz turbo mean for sustained workloads?

Each Xeon Gold 6148 runs at 2.4 GHz base and can reach 3.7 GHz turbo across its 20 cores, giving 40 threads total for compute-intensive tasks.

How does the 12 Gb/s SAS controller cap real-world SSD throughput?

The H730P 12 Gb/s SAS/SATA controller connects the eight SATA 6 Gb/s SSDs, so each drive is limited to the SATA 6 Gb/s link speed.

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