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Eight green DDR4 ECC registered RDIMM modules in a row

OWC

OWC 512GB (8x64GB) DDR4 2933 CL21 ECC Registered RDIMM Supermicro H12SST-PS

SKU CH-M0K3-RRG6M

Eight-module DDR4 ECC registered RDIMM kit providing 512 GB at 2933 MHz CL21 for Supermicro H12SST-PS servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 512GB (8 x 64GB)

  • ECC registered design prevents data corruption in critical workloads
  • 512 GB total capacity across eight 64 GB modules for high-density servers
  • DDR4 2933 CL21 at 1.2 V balances speed and power efficiency
  • 288-pin RDIMM form factor fits Supermicro H12SST-PS motherboards
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Targeted Server Upgrade

This kit delivers 512GB across eight 64GB DDR4 2933 CL21 ECC registered RDIMMs built for the Supermicro H12SST-PS motherboard. It is intended for administrators expanding workstation or server memory capacity with validated modules. Buyers needing unbuffered desktop memory or load-reduced DIMMs cannot use this kit.

DDR4 2933 Registered Limits

The modules run at 1.2V with a 2Rx4 organisation and conform to the PC4-23400 standard. Registered signalling adds one cycle of latency and requires a platform that supports registered ECC DIMMs; consumer chipsets will not POST with them. The kit is backward compatible with 2133, 2400 and 2666MHz bus speeds when the system dictates a lower frequency.

Replaces Supermicro OEM Parts

This upgrade directly replaces Supermicro part numbers MEMDR464LCL01ER29, MEMDR464LHL02ER29, MEMDR464LSL01ER29 and MEM-DR464MC-ER29. The jump is worthwhile when the board has free 288-pin slots and the workload demands the full 512GB registered capacity. Systems limited to unbuffered memory or smaller maximum capacities will not benefit.

How it compares

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

Price $3,001.99
Pricier than about 73% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $5.86 per GB
Cheaper than about 67% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R4512K
Total capacity512 GB (8 × 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

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Questions about this item

Should I choose the 512GB kit or would a smaller capacity work for the Supermicro H12SST-PS?

The 512GB kit provides 8 modules of 64GB each, filling all slots on the H12SST-PS for maximum registered ECC capacity.

What does the 2933MHz speed actually deliver when installed in the H12SST-PS?

The modules run at DDR4 2933 PC4-23400 CL21 1.2V, and the board will clock them at the highest supported frequency up to that rating.

Is the 288-pin DDR4 interface on these RDIMMs compatible with the H12SST-PS memory slots?

Yes, the 288-pin ECC registered DDR4 form factor matches the H12SST-PS slots; the kit is also backward compatible with 2133MHz, 2400MHz and 2666MHz operation.

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