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Four green DDR5 ECC registered DIMMs in static bags

OWC

OWC 256GB (4×64GB) DDR5 4800 PC5-38400 CL40 2Rx4 288-pin 1.1V ECC Registered RDIMM memory upgrade

SKU CH-B294-G38Z0

A 256GB DDR5 ECC registered RDIMM kit with four 64GB modules at 4800MHz CL40 for ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity in a four-module kit
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense systems
  • Validated for ThinkSystem SR675 V3, SR850 V3, SR860 V3, ST650 V3

256GB DDR5 ECC RDIMM kit

This kit provides 256GB of DDR5 ECC registered memory in four 64GB modules. It runs at 4800MHz with CL40 latency and operates at 1.1V. The modules use a 288-pin RDIMM form factor with 2Rx4 organisation. They are built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers.

Suited for registered ECC server slots only

This memory fits workstations and servers that require registered ECC DDR5 RDIMMs. It will not work in standard desktop computers or systems that take unbuffered or load-reduced modules. Buyers who need non-ECC consumer memory should look elsewhere.

Four modules fill four slots for 256GB total

The 256GB capacity is reached when all four 64GB modules are installed. Each module is a 2Rx4 registered DIMM, so the kit scales to the full amount without mixing ranks. Systems needing more than 256GB will require additional kits or higher-density modules.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $5,275.99
Pricier than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $20.61 per GB
Pricier than about 66% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo ThinkSystem SR675 V3
Lenovo ThinkSystem SR850 V3
Lenovo ThinkSystem SR860 V3
Lenovo ThinkSystem ST650 V3

Other versions of this model

5 more in the same range

Questions about this item

What server models must I already own for this 256 GB DDR5 4800 kit to be compatible?

The kit is validated for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers; it will not work in other platforms.

Can I mix these registered ECC modules with unbuffered or load-reduced memory already installed in my server?

No, the manufacturer states this registered ECC memory cannot be mixed with unbuffered or ECC load-reduced modules; all slots must use the same registered type.

How can I verify the modules are running at the rated 4800 MT/s CL40 after installation?

Check the server BIOS or operating system memory report; it should show DDR5 4800 (PC5-38400) with CAS latency 40 and 1.1 V operation.

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