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Four green 288-pin DDR4 LRDIMM sticks, no heat spreaders

OWC

OWC 512GB (4x128GB) DDR4 2933MHz CL21 4Rx4 ECC Load Reduced LRDIMM 1.2V 288-pin Server RAM

SKU CH-W5ZS-QAA84

Four 128GB DDR4 2933MHz ECC load-reduced modules totalling 512GB for server and workstation upgrades

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 512GB (4 x 128GB)

  • Massive 512 GB capacity from four 128 GB modules
  • ECC load-reduced design protects data integrity in servers
  • JEDEC-compliant DDR4 2933 MHz CL21 at 1.2 V
  • Backward compatible with 2133, 2400 and 2666 MHz systems
  • 288-pin LRDIMM form factor fits server and workstation slots

Server memory upgrade

This 512GB kit contains four 128GB DDR4 2933MHz ECC Load Reduced DIMMs built for servers, workstations and NAS systems. The modules run at 1.2V with CL21 latency and a 4Rx4 rank configuration on 288-pin connectors. They are fully JEDEC compliant and tested to meet OEM specifications.

Suits high-capacity server builds

This memory is designed for platforms that require registered ECC LRDIMM modules and will not work in standard desktop computers. It cannot be mixed with unbuffered memory, so buyers needing consumer DIMMs should look elsewhere. Backward compatibility covers 2133MHz, 2400MHz and 2666MHz speeds.

Handles large memory workloads

The 512GB total capacity provides substantial headroom for virtualization, database caching and multi-user workloads. Four populated slots leave no room for further expansion on typical dual-channel boards, so systems requiring more memory would need a platform with additional channels or higher-density modules.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $2,923.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 91% of the 6,064 comparable items (median 32 GB).
Price per GB $5.71 per GB
Cheaper than about 67% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2L9D44R4512S
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

Does my server need 288-pin DDR4 LRDIMM slots to use this 512GB kit?

Yes, this kit uses 288-pin DDR4 ECC Load Reduced DIMMs that require server or workstation boards with LRDIMM support; standard desktop motherboards cannot accept them.

Will these 2933MHz modules run correctly if my system currently uses 2400MHz memory?

The modules are backward compatible with 2133MHz, 2400MHz and 2666MHz speeds and will operate at the highest common frequency supported by the platform.

How can I confirm the 4Rx4 ECC LRDIMMs are recognised at 2933MHz after installation?

Check the BIOS memory information or run a system utility such as dmidecode to verify each 128GB module shows 2933MHz, CL21, 4Rx4 and ECC Load Reduced status.

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