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Four green DDR5 RDIMM modules in a row

OWC

OWC 128GB (4x32GB) DDR5 5200 CL42 ECC Registered RDIMM Server RAM

SKU CH-1XYK-EMKP9

A 128 GB DDR5-5200 ECC registered RDIMM kit of four 32 GB modules at CL42 and 1.1 V 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 rank2Rx4

Capacity 128GB (4 x 32GB)

  • ECC registered design protects data integrity in critical workloads
  • 128GB kit with four 32GB modules scales server capacity
  • DDR5 5200 speed at 1.1V delivers efficient throughput
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • 2Rx4 registered RDIMM fits select workstations and servers

128GB DDR5-5200 ECC RDIMM kit

This OWC kit delivers 128GB of DDR5-5200 ECC registered memory across four 32GB modules. It is built for workstations, servers, NAS systems and network switches that require registered DIMMs with error correction.

Check DDR5 RDIMM slot support

Verify that your platform accepts 288-pin DDR5 registered DIMMs at 1.1V with a 2Rx4 organisation. This memory will not work in standard desktop boards, consumer laptops or any system that requires unbuffered or load-reduced modules.

Fits registered DDR5 channels

The four-module kit populates dual-channel configurations in compatible servers and workstations. It provides registered buffering and ECC for data integrity while leaving additional DIMM slots free for future capacity expansion.

How it compares

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

Price $3,097.99
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 $24.20 per GB
Pricier than about 85% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R2D52R4128S
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 rank2Rx4
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

What comes in the box and what else is needed to install this kit?

The kit includes four 32 GB DDR5 5200 CL42 ECC registered RDIMM modules for a total of 128 GB. No extra parts are required; install them into compatible 288-pin DDR5 server or workstation slots.

Why choose this 128 GB quad-rank kit instead of a smaller capacity?

Four 32 GB 2Rx4 modules populate four slots at once, giving maximum capacity per channel on platforms that support registered ECC DDR5 5200.

What does the 5200 MT/s rating deliver in a real server?

At 5200 MT/s with CL42 latency and 1.1 V operation, the modules provide JEDEC-standard bandwidth for supported workstations, NAS systems and servers.

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