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Single green 288-pin DDR5 RDIMM module with black chips, no heat spreader

OWC

OWC 128GB DDR5 5200 CL42 4Rx4 288-pin 1.1V ECC Registered RDIMM server RAM

SKU CH-62DY-07KW8

A 128 GB DDR5 ECC registered DIMM running at 5200 MT/s with CL42 latency and 1.1 V operation for compatible servers and workstations

  • Capacity128GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 5200 (PC5 41600)
  • CAS LatencyCL42
  • Voltage1.1V
  • ECCYes

Capacity 128GB

Show 4 more configurations

Rank 4Rx4

  • 128GB single module maximises server capacity
  • DDR5 5200 PC5-41600 speed accelerates data throughput
  • ECC registered design protects data integrity
  • 1V JEDEC standard voltage lowers power draw
  • 288-pin 4Rx4 form factor fits select workstations and servers

128GB DDR5 ECC RDIMM for Servers

This single 128GB DDR5 5200 CL42 4Rx4 registered DIMM is built for workstations, servers and NAS systems that require ECC error correction. It runs at 1.1V and conforms to JEDEC PC5-41600 specifications for enterprise environments.

Straightforward 288-pin installation

The module seats in a standard DDR5 RDIMM slot without tools or heat-spreader clearance issues. The most common mistake is attempting to mix this registered ECC memory with unbuffered or load-reduced DIMMs, which the platform will not support.

Verify registered ECC support first

Confirm your motherboard or server platform explicitly lists DDR5 registered ECC RDIMM compatibility and 4Rx4 rank support before ordering. Standard desktop boards and consumer laptops cannot use this module, and mixing registered with unbuffered memory will prevent boot.

Highlights

  • 128GB single module maximises server capacity
  • DDR5 5200 PC5-41600 speed accelerates data throughput
  • ECC registered design protects data integrity
  • 1V JEDEC standard voltage lowers power draw
  • 288-pin 4Rx4 form factor fits select workstations and servers

Specifications

BrandOWC
Part Number5R2D54R4128G
Capacity128GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 5200 (PC5 41600)
CAS LatencyCL42
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I confirm the 128GB DDR5 5200 module is running at CL42 after installation?

Enter the system BIOS or UEFI and check the memory information screen; it should report DDR5 5200 speed with a CAS latency of 42 for the installed 128GB module.

What comes with the OWC 5R2D54R4128G module and what must be sourced separately?

The box contains a single 128GB 288-pin DDR5 ECC Registered RDIMM; no heat spreader or extra cables are included, and any additional DIMMs or cooling must be purchased separately.

When should I choose this 128GB 4Rx4 DDR5 5200 CL42 1.1V RDIMM over other capacities?

Select this 128GB 4Rx4 module when your workstation or server requires maximum registered ECC capacity per slot at the standard 5200 CL42 1.1V specification.

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