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Four green DDR5 RDIMM sticks with gold contacts and black chips

OWC

OWC 128GB (4x32GB) DDR5 4800 CL40 ECC RDIMM Kit

SKU CH-JCJ9-RPRFH

A 128 GB DDR5 ECC registered RDIMM kit of four 32 GB modules at 4800 MT/s CL40 for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 128GB (4 x 32GB)

  • 128 GB total capacity from four 32 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1 V operation reduces power draw under load
  • Validated for ThinkSystem SR675 V3 SR850 V3 SR860 V3 ST650 V3

128 GB DDR5 ECC RDIMM Kit

This kit delivers 128 GB of DDR5 4800 ECC registered memory in four 32 GB modules. It is built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers that require registered DIMMs with error correction.

Server and Workstation Upgrade

The modules suit administrators expanding capacity in the listed ThinkSystem platforms or building new nodes that demand registered ECC memory. They will not work in standard desktops, consumer workstations or any system that only accepts unbuffered or load-reduced DIMMs.

Straightforward DIMM Installation

Installation follows the server’s documented memory population rules; seat each 288-pin module until the ejectors latch. The most common issue is mixing these registered DIMMs with unbuffered or LRDIMM types, which prevents the system from posting.

How it compares

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

Price $3,443.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $26.91 per GB
Pricier than about 75% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R8128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
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

Which Lenovo ThinkSystem servers must I already own for this 128GB DDR5 4800 ECC RDIMM kit to work?

This kit is validated for the ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers.

Can I keep my existing DDR5 4800 RDIMMs and add these four 32GB modules without issues?

Only if the installed modules are also ECC registered 2Rx8 DDR5 4800 CL40 at 1.1V; mixing with unbuffered or load-reduced DIMMs is not supported.

How do I confirm the kit is running at the rated 4800 MT/s CL40 after installation?

Check the server BIOS or operating system memory report — it should show 4800 MT/s speed, CL40 latency, 1.1V voltage and ECC registered status for all four modules.

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