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Two green DDR5 RDIMM modules with gold contacts and black chips, no heat spreader

OWC

OWC 256GB (2x128GB) DDR5 4800 CL40 4Rx4 288-pin ECC RDIMM memory upgrade

SKU CH-FHDH-R5G3V

Adds 256 GB of DDR5 4800 CL40 ECC registered memory to compatible Lenovo ThinkSystem servers

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 256GB (2 x 128GB)

  • 256 GB total capacity across two 128 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1 V operation reduces power draw per module
  • Validated for ThinkSystem SR675 V3, SR850 V3, SR860 V3, ST650 V3

Server-grade ECC RDIMM kit

This 256 GB kit contains two 128 GB DDR5 4800 registered DIMMs built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers. Each module runs at 1.1 V with CL40 latency and 4Rx4 organisation. ECC and register circuitry protect data integrity in multi-socket workloads.

Sustained throughput stability

Registered buffering and on-die ECC keep signal quality consistent across all ranks during long compute runs. The JEDEC-standard 4800 MT/s data rate delivers predictable bandwidth without voltage scaling. Dual-module population lets the memory controller interleave channels for steady throughput.

288-pin DDR5 4Rx4 registered form factor

The 288-pin RDIMM pin-out and 4Rx4 rank geometry only fit platforms that explicitly support registered ECC DDR5. Standard desktops, consumer workstations and systems requiring unbuffered or load-reduced DIMMs cannot use this kit.

Ciri-ciri utama

  • 256 GB total capacity across two 128 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1 V operation reduces power draw per module
  • Validated for ThinkSystem SR675 V3, SR850 V3, SR860 V3, ST650 V3

Spesifikasi

BrandOWC
Part Number4R8D54R4256P
Capacity256GB (2 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR675 V3
Lenovo ThinkSystem SR850 V3
Lenovo ThinkSystem SR860 V3
Lenovo ThinkSystem ST650 V3

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How much power does the 1.1 V DDR5 4800 kit draw under continuous server load?

Each 128 GB module runs at 1.1 V, the standard JEDEC voltage for DDR5 4800, so total draw scales with the number of populated slots in your ThinkSystem chassis.

Which Lenovo ThinkSystem models must I already own for this 256 GB kit to work?

The kit is validated for ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3; it will not function in standard desktops or unbuffered platforms.

Can I mix these 4Rx4 registered DIMMs with the 2Rx8 modules already in my SR850 V3?

No — the manufacturer states these ECC registered DIMMs cannot be mixed with unbuffered or load-reduced memory, so all slots must use matching registered modules.

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