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Four green DDR4 RDIMM modules with gold contacts and black chips, no heat spreader

OWC

OWC 256GB (4×64GB) DDR4 3200MHz CL22 ECC Registered RDIMM 1.2V 288-pin server RAM

SKU CH-F3ES-XK2PW

256 GB of DDR4 3200 MHz ECC registered server memory in a four-module kit

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

Show 4 more

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 256GB total capacity across four 64GB modules expands memory headroom
  • DDR4 3200MHz speed with CL22 latency delivers responsive throughput
  • 2V operation meets JEDEC standard for efficient power use
  • 288-pin RDIMM form factor fits registered server slots

Server-grade ECC RDIMM kit

This OWC kit provides 256GB of DDR4 3200 memory across four 64GB registered DIMMs. Each module runs at CL22 latency with a 1.2V operating voltage. The 2Rx4 organisation and ECC registration target multi-socket workstations and servers that require registered memory.

Replaces unbuffered or lower-capacity DIMMs

The jump is worthwhile when your workload exceeds the addressable memory of standard unbuffered modules or when data integrity demands error-correcting code. Mixing these registered DIMMs with unbuffered memory is not supported and will prevent boot.

Verify platform compatibility first

Confirm that your motherboard and CPU support DDR4 288-pin registered ECC RDIMMs and can populate four slots in the required channel configuration. The kit is a dual-channel set, so the board must expose at least two channels with two slots each.

How it compares

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

Price $1,469.99
Pricier than about 83% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $5.74 per GB
Cheaper than about 66% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D42R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

Does the 288-pin DDR4 RDIMM form factor fit my server board?

These modules use the standard 288-pin DDR4 RDIMM form factor, so they fit any motherboard slot built for DDR4 registered memory.

What installation step is commonly missed with 2Rx4 registered DIMMs?

Populate slots in the order the motherboard manual specifies for 2Rx4 registered modules; skipping the prescribed sequence prevents the system from posting.

When will the 1.2V ECC registered kit need replacement?

DDR4 ECC registered memory has no scheduled replacement interval; it runs until a module fails or a platform upgrade requires a different generation.

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