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Two green DDR4 RDIMM sticks in static bags

OWC

OWC 64GB (2x32GB) DDR4 3200MHz PC4-25600 CL22 2Rx4 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-A5HS-KZ3RE

64 GB dual-channel kit of DDR4 3200 ECC registered RDIMMs with CL22 latency and 1.2 V operation

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes

Capacity 64GB (2 x 32GB)

Show 4 more configurations

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • Dual-channel 64 GB kit boosts multitasking capacity
  • JEDEC-standard DDR4 3200 MHz ensures broad compatibility
  • Low 1.2 V operation reduces power draw
  • 288-pin RDIMM form factor fits server slots

Server ECC RDIMM Kit

This 64GB dual-channel kit contains two 32GB DDR4 3200MHz registered ECC modules built to JEDEC specifications. It is designed for workstations and servers that require registered memory with error correction. The modules operate at 1.2V with CL22 latency and a 2Rx4 rank structure. This memory will not function in standard desktop computers or alongside unbuffered DIMMs.

Registered ECC Benefits

Registered buffering reduces electrical load on the memory controller, allowing larger capacities per channel in multi-socket platforms. On-die ECC detects and corrects single-bit errors to protect data integrity in critical workloads. JEDEC compliance and RoHS certification ensure a warranty-safe upgrade path for OEM-qualified systems. The dual-channel matched pair is validated for synchronous operation.

Capacity and Limits

The 64GB total capacity supports virtualization hosts, database buffers and large-file workloads that exceed typical desktop limits. Systems with restricted DIMM slots or lower maximum registered-memory ceilings may not address the full kit. Workloads requiring higher frequencies or lower latencies than DDR4 3200 CL22 will not benefit from this specification. Buyers needing unbuffered memory or consumer-platform compatibility must choose a different product type.

Highlights

  • ECC registered design protects data integrity in servers
  • Dual-channel 64 GB kit boosts multitasking capacity
  • JEDEC-standard DDR4 3200 MHz ensures broad compatibility
  • Low 1.2 V operation reduces power draw
  • 288-pin RDIMM form factor fits server slots

Specifications

BrandOWC
Part Number3R2D42R4064P
Capacity64GB (2 x 32GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

Other versions of this model

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Questions about this item

Do the 2Rx4 registered ECC modules need any firmware updates or periodic replacement in continuous server operation?

The modules are built to JEDEC specifications and tested for long-term service; no firmware updates or scheduled replacement are required beyond standard server maintenance.

What limits sustained throughput on these CL22 3200MHz modules under heavy load?

The CAS latency of 22 cycles at 3200MHz sets the primary timing boundary for sustained data transfer rates.

How much heat and power do the 1.2V 288-pin RDIMMs produce when running all day?

Each module operates at 1.2V without a heat spreader, so thermal output stays within standard DDR4 limits for registered server memory.

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