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Green 288-pin DDR4 LRDIMM module with black memory chips and gold contacts

OWC

OWC 128GB DDR4 3200 CL22 4Rx4 LRDIMM ECC Server RAM

SKU CH-5F5N-854P7

A 128 GB DDR4 3200 ECC load-reduced DIMM for servers and workstations, running at CL22 and 1.2 V with 4Rx4 organisation and backward compatibility to 2133, 2400, 2666 and 2933 MHz

  • Capacity128GB
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes
  • 128 GB capacity lets servers handle large workloads
  • DDR4 3200 CL22 speed matches PC4-25600 bandwidth
  • ECC load-reduced design protects data integrity under load
  • 2 V operation keeps power draw low per module
  • Backward compatible with 2133, 2400, 2666 and 2933 MHz systems

128GB DDR4 3200 LRDIMM for servers

This 128GB DDR4 3200 module uses ECC load-reduced technology for workstations, servers and NAS systems. It runs at PC4-25600 with CL22 latency and 1.2V power. The 288-pin 4Rx4 design targets administrators who need high-density registered memory for multi-socket platforms.

LRDIMM limits and mixing rules

Load-reduced DIMMs reduce electrical load on the memory bus but cannot be mixed with unbuffered or standard registered ECC modules. The platform must support LRDIMM topology; desktop consumer boards do not. Backward compatibility covers 2133, 2400, 2666 and 2933MHz speeds when the controller negotiates down.

Platform checks before ordering

Verify that your server or workstation lists LRDIMM support and accepts 4Rx4 128GB modules per slot. Confirm the HP part numbers P06037-B21, P06037-H21, P06037-K21, P43171-B21 or P07652-B21 match your service manual. Ensure no unbuffered or registered DIMMs are already installed in the same channel.

Highlights

  • 128 GB capacity lets servers handle large workloads
  • DDR4 3200 CL22 speed matches PC4-25600 bandwidth
  • ECC load-reduced design protects data integrity under load
  • 2 V operation keeps power draw low per module
  • Backward compatible with 2133, 2400, 2666 and 2933 MHz systems

Specifications

BrandOWC
Part Number3L2D44R4128G
Capacity128GB
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo

Questions about this item

Should I pick the 128GB 4Rx4 LRDIMM or a smaller ECC registered module?

This is a single 128GB 4Rx4 load-reduced DDR4 3200 CL22 module at 1.2V. It cannot be mixed with unbuffered or standard ECC registered memory and is intended for server or workstation platforms that support LRDIMM topology.

What does the 3200 CL22 rating deliver once installed in a compatible server?

The module operates at 3200MT/s with 22-cycle CAS latency. Actual throughput depends on the platform memory controller, channel population and BIOS settings; the JEDEC-standard timings ensure stable operation at the rated speed.

How does the DDR4 3200 PC4-25600 interface limit performance in practice?

The 288-pin DDR4 interface caps the data rate at 3200MT/s. The module is backward compatible with 2133, 2400, 2666 and 2933MT/s bus speeds, so it will downclock automatically if the system runs a lower memory frequency.

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