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Green bare circuit board DDR5 RDIMM module with black memory chips and gold edge contacts

OWC

OWC 64GB DDR5 4800 CL40 2Rx4 288-pin 1.1V ECC Registered RDIMM server RAM

SKU CH-WR2S-3VD7N

A single 64 GB DDR5 4800 CL40 2Rx4 288-pin 1.1 V ECC registered RDIMM for select workstations or servers

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB

Show 4 more

Rank 2Rx4

  • 64 GB capacity expands server memory headroom
  • DDR5 4800 speed delivers high data throughput
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • JEDEC compliant module ensures broad compatibility

Server-grade ECC RDIMM for workstations

This 64 GB DDR5 module is built for registered ECC platforms found in select workstations and servers. It will not function in standard desktop computers and cannot be mixed with unbuffered or load-reduced DIMMs. System administrators upgrading compatible OEM infrastructure can install a single 64 GB stick to increase memory capacity without replacing existing matched sets.

JEDEC-standard voltage and thermal profile

The module operates at the standard 1.1 V defined for DDR5 4800 and carries no heat spreader, relying on the chassis airflow typical of 1U or 2U server enclosures. Registered buffering reduces electrical load on the memory controller, helping keep power draw predictable under sustained workloads. Acoustic impact is negligible because the DIMM itself has no moving parts.

Single-slot 288-pin upgrade path

A single 288-pin slot accepts this 2Rx4 registered DIMM, freeing remaining slots for future expansion or matched kits. JEDEC and ROHS compliance means the module meets OEM specifications without requiring BIOS tweaks or voltage adjustments. Buyers needing consumer desktop memory, unbuffered ECC, or load-reduced variants should look elsewhere.

How it compares

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

Price $1,386.99
Pricier than about 83% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $21.67 per GB
Pricier than about 83% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R464 GB
Total capacity64 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
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 RDIMM and what step is commonly missed?

Align the notch on the 288-pin module with the slot key, press firmly until both clips lock, and verify the motherboard is set to 1.1 V for DDR5 4800 operation; the step often missed is enabling registered ECC mode in BIOS so the 2Rx4 rank is recognised.

What maintenance or replacement will the 64 GB ECC registered module need over time?

No routine maintenance is required; the module has no heat spreader, so keep chassis airflow clean, and replace only if ECC logs report uncorrectable errors or a DIMM fails POST.

What limit appears first when the RDIMM runs sustained workloads at CL40?

The CAS latency of CL40 at DDR5 4800 sets the timing ceiling; sustained throughput is bounded by the 4800 MT/s data rate and 1.1 V operating voltage before thermal throttling or stability limits are reached.

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