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Two green DDR5 ECC registered RDIMM modules in anti-static tray

OWC

OWC 64GB (2x32GB) DDR5 5200 PC5-41600 CL42 2Rx4 ECC Registered RDIMM server RAM

SKU CH-F87B-09RPY

Dual-channel 64GB kit of DDR5 5200 ECC registered RDIMMs for compatible workstations and servers

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (2 x 32GB)

  • ECC registered design protects data integrity in servers
  • 64 GB dual-channel kit doubles bandwidth for heavy workloads
  • DDR5 5200 speed with CL42 latency accelerates throughput
  • 1 V operation lowers power draw under load
  • JEDEC and RoHS compliant for warranty-safe upgrades

ECC Registered DDR5 for servers

This 64 GB kit delivers two 32 GB DDR5 5200 modules built to the PC5-41600 standard with CL42 latency. Each stick is a 288-pin registered DIMM operating at 1.1 V and organised as 2Rx4 with on-die ECC. The memory is designed for workstations, NAS appliances, servers and network switches that require registered ECC modules.

Replacing unbuffered or lower-capacity DDR5

The jump is worth it when a platform demands registered ECC and cannot accept unbuffered or load-reduced DIMMs. Moving from single-rank or non-ECC memory adds the error correction and signal buffering that multi-socket boards and mission-critical workloads expect. The dual-channel kit also doubles density per slot compared with 16 GB or 8 GB alternatives.

Fits registered-DIMM slots in qualified systems

Installation requires a motherboard or riser wired for 288-pin DDR5 RDIMMs and a BIOS that supports the JEDEC PC5-41600 speed grade. No heat spreader is fitted, so airflow across the modules must be provided by the chassis. The kit frees the remaining DIMM slots for further registered ECC expansion up to the platform limit.

How it compares

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

Price $1,754.99
Pricier than about 85% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $27.42 per GB
Pricier than about 89% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R2D52R4064P
Total capacity64 GB (2 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
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

What motherboard slot does the 288-pin ECC Registered DIMM fit?

It fits a DDR5 RDIMM slot; the 288-pin keying matches registered server boards.

Which DIMM pair installs first for dual-channel operation?

Populate the two slots assigned to the same memory channel — typically slot 1 and slot 3 — so the kit runs in dual-channel mode.

When should the registered DIMMs be replaced under sustained server load?

JEDEC-compliant DDR5 modules rated at 1.1 V are designed for continuous operation; replace only if ECC logs report uncorrectable errors.

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