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Four green DDR5 ECC registered RDIMM modules, 288-pin, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR5 4800 CL40 2Rx4 288-pin 1.1V ECC Registered RDIMM Kit for ThinkSystem SR950 V3

SKU CH-H8CD-32Q2M

256 GB DDR5-4800 ECC registered quad-rank kit of four 64 GB modules at 1.1 V for Lenovo ThinkSystem SR950 V3

  • Capacity256GB (4 x 64GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed with CL40 latency at 1.1 V
  • ECC registered RDIMM for data integrity in servers
  • 2Rx4 dual-rank organisation optimises memory bandwidth
  • Validated for Lenovo ThinkSystem SR950 V3 systems

Server ECC DDR5 Kit

This OWC kit delivers 256GB of DDR5 ECC registered memory across four 64GB modules. It is built for the Lenovo ThinkSystem SR950 V3 server platform. The modules provide error-correcting code and registered buffering for data integrity in multi-socket workloads. They will not function in standard desktop computers or with unbuffered memory types.

JEDEC Registered Build

Each module uses a 288-pin RDIMM form factor without a heat spreader, running at the JEDEC-standard 1.1V. The registered design reduces electrical load on the server memory controller for stable operation at scale. Compatibility is validated specifically for the SR950 V3, so mixing with load-reduced or unbuffered DIMMs is not supported. This kit offers a warranty-safe upgrade path for existing infrastructure.

4800 CL40 Speed Rating

The modules operate at DDR5 4800 (PC5-38400) with a CAS latency of CL40 in a 2Rx4 rank configuration. This speed grade matches the platform specification for the target server. Buyers needing higher frequencies or lower latencies must verify platform support before purchasing. The single rated speed determines whether this kit fits the required performance envelope.

Privalumai

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed with CL40 latency at 1.1 V
  • ECC registered RDIMM for data integrity in servers
  • 2Rx4 dual-rank organisation optimises memory bandwidth
  • Validated for Lenovo ThinkSystem SR950 V3 systems

Specifikacijos

BrandOWC
Part Number4R8D52R4256S
Capacity256GB (4 x 64GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR950 V3

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What speed does the DDR5 4800 PC5-38400 interface run at in this kit?

The modules operate at 4800 MT/s with a PC5-38400 data rate and CL40 latency.

What physical slot and module count does the 256GB kit require?

Four 288-pin DDR5 RDIMM slots are needed, one per 64GB module.

How is the ECC Registered kit installed in the ThinkSystem SR950 V3 and what step is often missed?

Power down the server, open the chassis, insert each 2Rx4 RDIMM into the correct channel slots per the system guide, then enable ECC in BIOS — skipping the BIOS step leaves error correction inactive.

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