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Four green circuit boards with gold edge connectors and black chips, no heat spreaders

OWC

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

SKU CH-112D-XMHCQ

256 GB kit of four 64 GB DDR4 2933 ECC registered RDIMMs for HP Apollo 4500 Gen10 and 4510 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)

  • 256 GB total capacity across four 64 GB modules
  • DDR4 2933 MHz speed with CL21 latency for responsive server performance
  • ECC registered design detects and corrects data errors in critical workloads
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Server memory kit

This OWC kit supplies 256 GB of DDR4 ECC Registered RDIMM memory in four 64 GB modules. It is built for HP Apollo 4500 Gen10 and 4510 Gen10 servers that require registered error-correcting modules. Standard desktop boards cannot use this memory. Builders needing unbuffered or load-reduced DIMMs must choose a different product.

Build integration

Each module uses the 288-pin DDR4 form factor and runs at 1.2 V. The kit replaces a long list of HP part numbers including P19045-K21, P00930-H21 and P14636-001. Because the modules are registered, they cannot be mixed with unbuffered or ECC load-reduced memory in the same system. The four DIMMs populate the server's memory slots directly.

Thermals and power

Operating at 1.2 V keeps power draw low for high-density server configurations. No heat spreaders are fitted, so airflow through the chassis manages module temperatures. The memory is backward compatible with 2133, 2400 and 2666 MHz bus speeds, allowing flexible deployment in existing Apollo platforms.

How it compares

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

Price $1,444.99
Pricier than about 64% 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 $5.64 per GB
Cheaper than about 69% 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 Apollo 4500 Gen10
HP Apollo 4510 Gen10

Other versions of this model

5 more in the same range

Questions about this item

What is the maximum capacity this kit adds to an HP Apollo 4500 Gen10?

The kit provides 256GB total across four 64GB modules, each running at DDR4 2933 with CL21 latency and 1.2V operation.

How much heat do these modules produce during continuous server workloads?

Each 64GB RDIMM operates at 1.2V without a heat spreader; registered ECC DDR4 at this voltage typically stays within normal server thermal envelopes under sustained load.

Which existing HP part numbers does this OWC kit replace in the Apollo 4510 Gen10?

The kit replaces HP part numbers P19045-K21, P19045-B21, P00930-H21, P14636-001, P00930-K21, P06192-001, P03053-CA1, P00930-B21, P03053-1A1, P03053-0A1, P14492-B21 and P19045-H21.

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