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Green circuit board with black memory chips, 288 gold pins, no heat spreader

OWC

OWC 32GB DDR5 4800 CL40 2Rx8 1.1V ECC RDIMM memory upgrade

SKU CH-FW3V-KVMJH

32 GB DDR5-4800 ECC registered RDIMM for Lenovo ThinkSystem SR635 V3, SR645 V3, SR650 V3, SR655 V3 and SR665 V3 servers

  • Capacity32GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 32GB

  • 32 GB capacity lets you run larger workloads
  • DDR5 4800 MT/s CL40 delivers high throughput for server tasks
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense configurations
  • Validated for ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 SR665 V3

OWC 32GB DDR5 4800 ECC RDIMM

This module is a 32GB DDR5 4800 CL40 2Rx8 1.1V ECC registered DIMM built for Lenovo ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 and SR665 V3 servers. It targets IT teams maintaining or expanding those specific platforms.

ECC registered single module upgrade

The stick delivers error-correcting registered operation required by the listed ThinkSystem servers and replaces Lenovo part numbers 4X71M22549 4X77A77031 4X77A81440. It cannot be mixed with unbuffered or load reduced memory in the same system.

288-pin DDR5 keyed installation

The 288-pin DDR5 connector keys into the server DIMM slot in one orientation only. Common issues are inserting the module into an unsupported desktop board or mixing it with non-registered memory which prevents boot.

Points forts

  • 32 GB capacity lets you run larger workloads
  • DDR5 4800 MT/s CL40 delivers high throughput for server tasks
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense configurations
  • Validated for ThinkSystem SR635 V3 SR645 V3 SR650 V3 SR655 V3 SR665 V3

Caractéristiques

BrandOWC
Part Number4R8D52R832GB
Capacity32GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR635 V3
Lenovo ThinkSystem SR645 V3
Lenovo ThinkSystem SR650 V3
Lenovo ThinkSystem SR655 V3
Lenovo ThinkSystem SR665 V3

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Questions sur cet article

Will the 2Rx8 ECC RDIMM need firmware updates or battery-backed cache replacement over time?

The module has no onboard battery or firmware; it is a passive DDR5 ECC registered DIMM that requires no scheduled replacement or updates.

What thermal limit appears first when the 32 GB DDR5 4800 module runs at full load continuously?

The 1.1 V DDR5 DRAM and register components reach their maximum junction temperature before any other subsystem, so sustained airflow across the 288-pin module is the limiting factor.

How much power does the 1.1 V 32 GB DDR5 4800 RDIMM draw and how noisy is it during all-day server operation?

The module draws roughly 3–5 watts at 1.1 V and has no moving parts, so it adds no audible noise; only the system fans respond to the extra heat.

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