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Four green DDR4 ECC registered DIMMs 288-pin 1.2V

OWC

OWC 256GB (4x64GB) DDR4 2933 ECC RDIMM H12SST-PS

SKU CH-73GE-2ASJ7

A 256 GB kit of four 64 GB DDR4 2933 ECC registered DIMMs for Supermicro H12SST-PS servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • ECC registered design protects data integrity in servers
  • 256GB total capacity across four 64GB modules
  • DDR4 2933 speed with CL21 latency at 1.2V
  • Qualified for Supermicro H12SST-PS motherboard
  • Backward compatible with 2133, 2400 and 2666 speeds

Server-grade DDR4 ECC kit

This 256GB kit contains four 64GB DDR4 2933 ECC registered DIMMs built for the Supermicro H12SST-PS motherboard. It targets administrators who need maximum registered capacity in a supported four-module configuration. The modules operate at 1.2V with CL21 latency and 2Rx4 organisation. They are not compatible with standard desktop platforms or unbuffered memory.

288-pin registered form factor

Each module uses the 288-pin RDIMM layout required by server chipsets and includes on-board register circuitry for signal integrity at high density. The absence of a heat spreader keeps the profile low for dense chassis layouts. Registered buffering means these DIMMs cannot be mixed with unbuffered or load-reduced memory in the same system. Installation follows standard server DIMM seating procedures.

DDR4 2933 with backward steps

The kit runs natively at 2933 MT/s (PC4-23400) and will down-clock to 2666, 2400 or 2133 MT/s when the platform demands it. Total capacity is fixed at 256GB across the four slots populated by this kit. Builders needing more memory must use a motherboard with additional DIMM slots or higher-density modules not included here.

How it compares

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

Price $1,653.99
Pricier than about 66% 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 $6.46 per GB
Cheaper than about 61% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro Motherboard H12SST-PS

Other versions of this model

5 more in the same range

Questions about this item

What DDR4 standard and speed does this kit use, and what does that cap in practice?

The kit runs at DDR4 2933 (PC4-23400) with CL21 latency and 1.2V; the motherboard's memory controller limits the actual data rate, so it will not exceed 2933 MT/s.

What physical slot and form factor do these modules need on the Supermicro H12SST-PS?

They require 288-pin DDR4 RDIMM slots; each module is a 64 GB 2Rx4 registered DIMM without a heat spreader.

How are the four modules installed, and what step do people often get wrong?

Populate all four slots following the board's channel order; the common mistake is mixing these registered ECC DIMMs with unbuffered or load-reduced memory, which the board will not accept.

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