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Four green DDR4 RDIMM sticks with gold contacts and black chips

OWC

OWC 256GB (4x64GB) DDR4 3200 CL22 ECC Registered RDIMM 288-pin 1.2V

SKU CH-ZC5J-N7R9T

256 GB kit of four 64 GB DDR4 3200 CL22 ECC registered RDIMMs for Supermicro H12SSL and H12SSW motherboards

  • 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)

  • 256 GB total capacity from four 64 GB modules
  • DDR4 3200 speed with CL22 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense configurations
  • Validated for Supermicro H12SSL and H12SSW motherboards

Server ECC RDIMM kit

This 256GB kit contains four 64GB DDR4 3200 registered DIMMs built for Supermicro H12SSL and H12SSW server boards. ECC and registered operation protect data integrity in multi-socket workloads. The modules run at 1.2V with CL22 latency and a 2Rx4 organisation. Standard desktop systems cannot use this memory.

Capacity and headroom

Four ranks per module give dense population for virtualization, database and compute nodes that need large address space. The 256GB total fills four slots on the validated Supermicro platforms. Workloads exceeding this capacity or requiring load-reduced DIMMs will need a different memory type.

Thermals and power

Bare modules without heat spreaders rely on chassis airflow for cooling in 1U and 2U server enclosures. Registered buffers and ECC logic add modest power draw at 1.2V, typical for DDR4 server DIMMs. Acoustic output depends entirely on system fan curves rather than the memory itself.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $1,555.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.08 per GB
Cheaper than about 65% of the 20,941 comparable items (median $8.19 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
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro Motherboard H12SSL-CT
Supermicro Motherboard H12SSL-NT
Supermicro Motherboard H12SSW-iNR
Supermicro Motherboard H12SSW-NTR

Other versions of this model

5 more in the same range

Questions about this item

Will these 64 GB DDR4 3200 CL22 ECC registered modules work in the same server as my existing Supermicro H12SSL-NT memory?

They are qualified for the H12SSL-NT and other listed Supermicro boards; do not mix with unbuffered or load-reduced DIMMs.

How can I confirm the 256 GB kit is running at 3200 MT/s with ECC active after installation?

Check the BIOS memory information screen for 3200 MT/s speed and ECC enabled status.

Does the 4 × 64 GB kit include heat spreaders or mounting hardware, or must I buy them separately?

The modules have no heat spreaders and no extra hardware is included or required.

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