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Green rectangular DDR4 memory module with gold contacts and black chips on both sides

OWC

OWC 32GB DDR4 2933MHz ECC Registered RDIMM for Lenovo ThinkSystem SR650 SR950

SKU CH-RXDE-8EA5F
  • Total capacity32 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 32GB

  • 32GB capacity expands server memory for larger workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2933MHz CL21 speed matches Lenovo ThinkSystem SR650 and SR950 specifications
  • 2V operation reduces power draw in dense configurations
  • Backward compatible with 2133MHz, 2400MHz and 2666MHz systems

Server Memory Upgrade

This 32GB DDR4 2933MHz ECC Registered RDIMM is built for Lenovo ThinkSystem SR650 and SR950 servers running Xeon SP Gen 2 processors. It targets administrators who need to expand memory capacity in supported enterprise platforms. The module will not work in standard desktop computers and cannot be mixed with unbuffered memory.

Capacity and Compatibility

The single 32GB module operates at PC4-23400 with CL21 latency and 1.2V voltage. It is backward compatible with 2133MHz, 2400MHz and 2666MHz bus speeds, allowing flexible deployment across supported configurations. Buyers who need higher density per slot or non-ECC memory for consumer hardware cannot use this module.

Thermals and Power

The RDIMM runs at 1.2V without a heat spreader, relying on server chassis airflow for cooling. Registered buffering and ECC functionality add minimal power overhead while maintaining data integrity under sustained workloads. Noise and thermal output remain governed by the host system fan curves rather than the memory itself.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $203.99
Cheaper than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $6.37 per GB
Cheaper than about 62% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R432 GB
Total capacity32 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo ThinkSystem (Xeon SP Gen 2) SR650
Lenovo ThinkSystem (Xeon SP Gen 2) SR950

Other versions of this model

5 more in the same range

Questions about this item

Will this 2933 MHz DDR4 module run correctly if I keep my existing 2133 MHz or 2400 MHz sticks in the ThinkSystem SR650?

The module is backward compatible with 2133 MHz, 2400 MHz and 2666 MHz speeds, so it will operate at the speed of the slowest installed DIMM.

How can I verify that the 32 GB ECC registered DIMM is functioning correctly after installation?

Check the BIOS or UEFI memory configuration screen; it should report 32 GB per module at 2933 MHz with ECC registered status enabled.

What comes in the box and do I need to buy anything else to install this 288-pin RDIMM?

The module itself is supplied; no extra brackets, cables or heat spreaders are required for installation in compatible ThinkSystem SR650 or SR950 servers.

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