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Four green DDR5 RDIMM modules in a row

OWC

OWC 128GB (4x32GB) DDR5 5200 CL42 2Rx8 ECC Registered RDIMM server RAM

SKU CH-DA35-V4NM1

A 128GB kit of four 32GB DDR5 5200 CL42 ECC registered RDIMMs for compatible workstations and servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 128GB (4 x 32GB)

Show 4 more

Rank 2Rx8

  • ECC registered design protects data integrity in servers
  • 5200 MT/s DDR5 speed supports demanding workloads
  • 128 GB kit (four 32 GB modules) expands memory capacity
  • 1 V operation reduces power draw per module
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server ECC Registered DDR5 Kit

This kit provides 128GB of DDR5 memory across four 32GB registered DIMMs. It is built for workstations, servers and NAS systems that require ECC error correction and registered buffering. The modules will not work in standard desktop computers or with unbuffered or load-reduced memory types.

Installation requires matching registered slots

The 288-pin RDIMMs install like ordinary DIMMs but must populate slots that support registered ECC DDR5. Mixing with unbuffered or load-reduced modules prevents booting. Verify the platform accepts 2Rx8 registered DDR5 at 1.1V before fitting the kit.

128GB DDR5 5200 CL42 2Rx8 registered

Capacity, speed, latency, rank and registered ECC are the decisive specifications. The kit delivers 128GB at DDR5-5200 with CL42 timing in a 2Rx8 registered configuration. Systems needing unbuffered memory, a different rank or a lower speed cannot use these modules.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $3,332.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $26.04 per GB
Pricier than about 87% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R2D52R8128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

How do I verify the kit is running at DDR5 5200 CL42 after installation?

Check the BIOS or UEFI memory information screen; it should report 5200 MT/s speed, PC5-41600 data rate, CL42 latency, 1.1 V voltage and ECC Registered operation for each 32 GB module.

What comes in the box and what must be purchased separately?

The kit includes four 32 GB DDR5 288-pin ECC Registered RDIMM modules (128 GB total). No heat spreaders, cables or additional components are supplied; a compatible workstation or server motherboard with DDR5 RDIMM slots is required.

Which capacity or version of this OWC DDR5 ECC RDIMM kit should I choose?

This specific part number (5R2D52R8128S) provides 128 GB as a matched 4 x 32 GB dual-channel kit at 5200 MT/s CL42; select it when your platform needs that exact capacity, speed and registered ECC configuration.

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