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Four green DDR4 RDIMM modules with gold contacts, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR4 2933 CL21 ECC Registered RDIMM memory upgrade

SKU CH-AZGT-7W802

256 GB kit of four 64 GB DDR4-2933 ECC registered DIMMs for HP ProLiant Gen10 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • ECC registered design protects data integrity in servers
  • 256GB total capacity across four 64GB modules
  • DDR4 2933 speed with CL21 latency at 1.2V
  • Compatible with HP ProLiant DL160 DL180 DL380 DX170r XL450 Gen10
  • Backward compatible with 2133 2400 2666MHz systems

Target server upgrade

This 256GB kit delivers four 64GB DDR4 2933 CL21 ECC registered RDIMMs built for HP ProLiant DL160 Gen10, DL180 Gen10, DL380 Gen10 Carrier Grade, DX170r Gen10 and XL450 Gen10 servers. It is not compatible with standard desktop computers or unbuffered and load-reduced memory types.

Capacity and headroom

The 256GB total across four modules fills four slots at 64GB each, running at PC4-23400 with CL21 latency and backward compatibility down to 2133, 2400 and 2666 MT/s. It will not suit builds that need higher densities per slot or speeds beyond 2933 MT/s.

Thermals and power

Modules operate at 1.2V without heat spreaders, relying on server chassis airflow for cooling. Registered buffering adds minimal latency overhead while ECC corrects single-bit errors during sustained workloads.

How it compares

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

Price $1,537.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.01 per GB
Cheaper than about 65% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R4256S
Total capacity256 GB (4 × 64 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 systemsHP ProLiant DL160 Gen10
HP ProLiant DL180 Gen10
HP ProLiant DL380 Gen10 Carrier Grade
HP ProLiant DX170r Gen10
HP ProLiant XL450 Gen10

Other versions of this model

5 more in the same range

Questions about this item

Will these 2933MHz CL21 2Rx4 modules run with my existing 2133MHz or 2400MHz DDR4 ECC RDIMMs?

Yes, the kit is backward compatible with 2133MHz, 2400MHz and 2666MHz DDR4 ECC Registered DIMMs, so it can operate alongside slower modules in the same server.

How do I confirm the 256GB kit is detected at PC4-23400 CL21 after installation?

Check the server BIOS or iLO interface — it should show 256GB total across four 64GB DIMMs running at 2933MHz with CL21 timings and ECC Registered status.

Does the package include only the four 64GB 288-pin ECC Registered DIMMs, or are any tools or cables required?

The box contains the four 64GB DDR4 2933 CL21 2Rx4 288-pin 1.2V ECC Registered RDIMM modules; no tools, cables or additional parts are included.

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