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Two green 288-pin DDR5 RDIMM modules without heat spreaders

OWC

OWC 4R8D51R8032P 32GB (2×16GB) DDR5 4800 CL40 ECC Registered RDIMM Server RAM

SKU CH-CHXQ-N96HJ

Dual-channel 32 GB DDR5 4800 ECC registered RDIMM kit with CL40 latency and 1.1 V operation for compatible servers

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx8

Capacity 32GB (2 x 16GB)

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Rank 1Rx8

  • ECC registered design protects data integrity in servers
  • Dual-channel 32 GB kit (2 × 16 GB) boosts multitasking capacity
  • DDR5 4800 CL40 speed meets JEDEC standard
  • Low 1.1 V voltage reduces power draw
  • 288-pin RDIMM form factor fits select workstations

Server ECC RDIMM Kit

This OWC kit supplies 32 GB of DDR5 ECC Registered memory in a matched pair of 16 GB modules. It is built for workstations and servers that require registered DIMMs and will not function in standard desktop computers. The dual-channel kit simplifies upgrades for compatible platforms.

Thermals and Power

Each module operates at the JEDEC-standard 1.1 V without a heat spreader, relying on system airflow for cooling. Registered buffering reduces electrical load on the memory controller, helping to keep power draw predictable during sustained workloads. No active cooling components are included.

DDR5 4800 CL40 Specification

The kit runs at DDR5 4800 (PC5-38400) with a CAS latency of CL40 in a 1Rx8 288-pin form factor. Compatibility is limited to platforms that support DDR5 ECC Registered RDIMMs; it cannot be mixed with unbuffered or load-reduced memory types.

How it compares

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

Price $845.99
Pricier than about 78% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $26.44 per GB
Pricier than about 88% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D51R8032P
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 288-pin DDR5 RDIMMs and what step is often missed?

Power off the server, open the chassis, align each 288-pin module with the DDR5 slot key notch, press firmly until both retention clips click, then enable ECC registered mode in BIOS before booting the OS.

What maintenance or replacement will the 1Rx8 ECC registered modules need later?

No routine maintenance is required; if a module fails the limited lifetime warranty covers replacement, but ECC registered DIMMs cannot be mixed with unbuffered or load-reduced memory when upgrading.

What limit appears first under sustained load with CL40 1.1V DDR5 4800?

The CL40 latency at 1.1V sets the timing envelope; sustained throughput is bounded by the DDR5 4800 transfer rate before thermal throttling becomes a factor.

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