We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular DDR5 RDIMM module with black chips and gold contacts

OWC

OWC 32GB DDR5 4800 CL40 1Rx4 288-pin 1.1V ECC Registered RDIMM for ThinkSystem SR950 V3

SKU CH-HX9X-W6Y6M

32 GB DDR5-4800 ECC registered RDIMM with CL40 latency and 1.1 V operation, validated for Lenovo ThinkSystem SR950 V3 servers

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

Capacity 32GB

  • ECC registered design protects data integrity in servers
  • 32 GB capacity expands ThinkSystem SR950 V3 memory
  • DDR5 4800 CL40 speed meets JEDEC specs
  • 1 V operation reduces power draw per module
  • Replaces Lenovo part numbers 4X77A77030 4X77A77483 4X77A81438 4X77A81439

32GB DDR5 ECC RDIMM for SR950 V3

This 32GB DDR5 4800 registered DIMM is built for the Lenovo ThinkSystem SR950 V3 server. It delivers ECC error correction and registered buffering required by enterprise workloads. The module runs at 1.1V with CL40 latency and a 1Rx4 organisation. It replaces Lenovo part numbers 4X77A77030 4X77A77483 4X77A81438 4X77A81439.

Registered ECC only no mixing

The module is registered ECC and cannot be mixed with unbuffered or load-reduced DIMMs in the same system. It carries no heat spreader and conforms to JEDEC and RoHS standards. OWC provides a limited lifetime warranty with free technical support and an advanced replacement programme. These services are supplied by the memory manufacturer not by the server vendor.

Verify slot count and population rules

Before ordering confirm the SR950 V3 has free 288-pin DDR5 slots and check the server documentation for maximum capacity per channel and supported population order. The module is not compatible with standard desktop motherboards or any system that requires unbuffered or load-reduced memory.

Highlights

  • ECC registered design protects data integrity in servers
  • 32 GB capacity expands ThinkSystem SR950 V3 memory
  • DDR5 4800 CL40 speed meets JEDEC specs
  • 1 V operation reduces power draw per module
  • Replaces Lenovo part numbers 4X77A77030 4X77A77483 4X77A81438 4X77A81439

Specifications

BrandOWC
Part Number4R8D51R432GB
Capacity32GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SR950 V3

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does this 1Rx4 ECC registered DIMM need scheduled replacement or firmware updates over its service life?

ECC registered DDR5 modules have no scheduled replacement interval; they remain in service until a correctable error becomes uncorrectable or the system requires more capacity.

What limit appears first when the SR950 V3 runs this 4800 CL40 module at full load continuously?

The memory controller’s maximum supported speed and the module’s CL40 latency set the throughput ceiling before thermal or power limits are reached.

How much heat and power does a single 1.1 V 32 GB DDR5 RDIMM add when the server runs all day?

At 1.1 V the module draws only a few watts and has no heat spreader, so it adds minimal heat to the chassis airflow.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.