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Green circuit board with black memory chips, gold edge connector, no heat spreader

OWC

OWC 16GB DDR5 4800 CL40 1Rx8 288-pin 1.1V ECC RDIMM 4R8D51R816GB

SKU CH-P0J9-6RWRA

16 GB DDR5 4800 ECC registered DIMM for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers

  • Capacity16GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 16GB

  • ECC registered design protects data integrity in critical workloads
  • DDR5 4800 speed delivers high bandwidth for server applications
  • 1 V operation reduces power draw per module
  • 16 GB single-rank capacity simplifies memory population
  • Validated for Lenovo ThinkSystem SR675 V3 SR850 V3 SR860 V3 ST650 V3

Server ECC RDIMM upgrade

This 16 GB DDR5 4800 CL40 registered DIMM is built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers. It delivers ECC error correction and registered buffering for stable operation in multi-socket workloads. The module runs at 1.1 V and follows JEDEC PC5-38400 timing. Buyers using standard desktop boards or unbuffered memory cannot use this part.

Simple slot install, no mixing

Installation is a standard 288-pin DIMM insertion; power down, open the chassis, seat the module until the latches click, then power on. The critical mistake is mixing this registered ECC stick with unbuffered or load-reduced DIMMs — doing so prevents boot or causes data errors. Follow the server vendor's population rules for rank and channel balance. No heat spreader is fitted, so airflow across the PCB is required.

Verify model and slot rules first

Confirm the exact ThinkSystem model matches SR675 V3, SR850 V3, SR860 V3 or ST650 V3 before ordering. Check the system service guide for maximum DIMMs per processor, supported ranks per channel and whether 1Rx8 modules are allowed in your planned configuration. Ensure the BIOS is current enough for DDR5 4800 registered memory. This module replaces Lenovo part numbers 4X71L72498, 4X77A77029 and 4X77A81437.

Points forts

  • ECC registered design protects data integrity in critical workloads
  • DDR5 4800 speed delivers high bandwidth for server applications
  • 1 V operation reduces power draw per module
  • 16 GB single-rank capacity simplifies memory population
  • Validated for Lenovo ThinkSystem SR675 V3 SR850 V3 SR860 V3 ST650 V3

Caractéristiques

BrandOWC
Part Number4R8D51R816GB
Capacity16GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR675 V3
Lenovo ThinkSystem SR850 V3
Lenovo ThinkSystem SR860 V3
Lenovo ThinkSystem ST650 V3

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Questions sur cet article

How do I verify the module is running at DDR5 4800 CL40 with ECC after installation?

Check the system BIOS or UEFI memory configuration screen; it should report DDR5 4800 MT/s, CAS latency 40, 1.1 V and ECC registered operation for each installed DIMM.

What comes in the box and do I need any extra parts to install this in a ThinkSystem SR850 V3?

The box contains one 16 GB DDR5 4800 CL40 1Rx8 288-pin 1.1 V ECC registered RDIMM; no additional cables, brackets or cooling accessories are required for installation in the supported ThinkSystem servers.

Which capacity should I choose if I want to match the Lenovo part numbers 4X71L72498, 4X77A77029 and 4X77A81437?

This 16 GB module is the direct replacement for all three Lenovo part numbers, so selecting the 16 GB version ensures compatibility with the listed ThinkSystem models.

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