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Two green DDR5 RDIMM sticks with black chips, no heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM DDR5 ECC RDIMM 128GB (2x64GB) 6400 CL52 1.1V 2Rx4 Registered Supermicro H13SST-GC memory upgrade

SKU CH-A31Q-AP143

A 128 GB DDR5 registered ECC kit built for the Supermicro H13SST-GC, running at 6400 MT/s with CL52 timing and 1.1 V operation

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128 GB total capacity with two 64 GB modules
  • DDR5 6400 speed rated at PC5-51200 bandwidth
  • Registered ECC design corrects single-bit errors automatically
  • 1 V operation at CL52 latency for server stability
  • 288-pin RDIMM form factor built for Supermicro H13SST-GC

128GB DDR5 ECC RDIMM kit

This 128GB kit contains two 64GB DDR5 6400 registered ECC RDIMMs built for the Supermicro H13SST-GC motherboard. It targets server administrators who need maximum registered capacity per channel with on-die error correction at 1.10V.

Installation requires matching population rules

The 288-pin RDIMM form factor fits only registered slots and must follow the board's exact population order; using the wrong slot sequence or mixing ranks prevents the system from recognising the full 128GB. No heat spreader is present, so airflow across the modules must be adequate.

Sustained load stability through registered ECC

Registered buffering offloads the memory controller so every slot runs fully populated at the rated 6400 speed and CL52 latency. ECC corrects single-bit errors continuously during long compute runs, preventing silent data corruption that would otherwise crash production workloads.

How it compares

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

Price $4,218.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $32.96 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-924K2
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB 2 × 64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How do I verify the kit is running at DDR5-6400 CL52 1.1V after installation?

Enter the BIOS or UEFI and confirm the memory frequency shows 6400 MT/s, CAS latency reads 52, and voltage is set to 1.1V; the registered ECC RDIMMs should also report 128 GB total capacity with no errors logged.

What does the MR51200-924K2 package contain and what extra parts are required?

The box includes two 64 GB 288-pin DDR5 RDIMM modules for a total of 128 GB; no additional memory components are needed, just an available DIMM slot pair on the Supermicro H13SST-GC motherboard.

Which capacity kit should I choose for the Supermicro H13SST-GC if I want the exact-match 2Rx4 registered ECC configuration?

Select the 128 GB (2 x 64 GB) DDR5-6400 CL52 1.1V 2Rx4 RDIMM kit, part number MR51200-924K2, which matches the board's registered ECC requirements and population rules.

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