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Green rectangular DDR5 RDIMM module with black chips and gold contacts

OWC

OWC 16GB DDR5 5600 CL46 1Rx4 288-pin 1.1V ECC Registered RDIMM server RAM

SKU CH-527M-RP01P

16 GB DDR5 5600 ECC registered RDIMM with CL46 latency and 1.1 V operation

  • Total capacity16 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx4

Capacity 16GB

  • 16 GB DDR5 ECC RDIMM adds reliable capacity to servers
  • CL46 latency at 5600 MT/s delivers responsive throughput
  • 1 V operation reduces power draw per module
  • 1Rx4 single-rank layout keeps signal integrity clean
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server ECC RDIMM upgrade

This OWC module is a 16GB DDR5 5600 CL46 registered DIMM built for select workstations and servers. It operates at 1.1V with a 1Rx4 organisation and a 288-pin interface. The part carries ECC and registered buffering for data integrity in multi-socket platforms. It will not work in standard desktop computers.

Capacity and headroom

A single 16GB stick adds substantial memory to compatible systems and handles typical virtualization or database workloads. Registered signalling and ECC protect data at scale but the module lacks a heat spreader, so sustained heavy loads depend on chassis airflow. Mixing with unbuffered or load-reduced DIMMs is not supported.

Registered DDR5 requirement

The decisive specification is the registered DDR5 ECC RDIMM form factor; only motherboards that explicitly support registered DDR5 5600 memory can use this module. Buyers whose platforms require unbuffered DDR5 or an earlier DDR generation cannot install this part.

How it compares

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

Price $398.99
Pricier than about 66% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $24.94 per GB
Pricier than about 86% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R6D51R416 GB
Total capacity16 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

Will this 1Rx4 DDR5 5600 CL46 288-pin ECC RDIMM work alongside other registered DDR5 modules I already have?

Mixing is only reliable when every module matches in capacity, speed, rank and manufacturer; the maker advises identical DIMMs for stable operation.

How can I confirm the 16 GB DDR5 5600 CL46 1.1 V ECC RDIMM is running correctly after installation?

Check the BIOS or UEFI memory report for 5600 MT/s speed, CL46 timings, 1.1 V voltage and ECC registered status on the slot you populated.

Does the single 16 GB DDR5 5600 PC5-44800 CL46 288-pin ECC RDIMM ship with any extra parts or cables?

Only the memory module itself is included; no heat spreader, cables, brackets or additional accessories come in the package.

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