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Two green DDR5 RDIMM modules in a clear plastic tray

NEMIX RAM

NEMIX RAM DDR5 6400 256GB 2x128GB ECC RDIMM Supermicro H13SST-GC

SKU CH-B5VY-9ZA3R

256 GB DDR5 6400 ECC registered RDIMM kit in two 128 GB modules, spec-matched for the Supermicro H13SST-GC motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256 GB total capacity from two 128 GB modules
  • DDR5 6400 speed with CL52 latency at 1.1 V
  • Registered ECC design corrects single-bit errors automatically
  • 2Rx4 dual-rank layout maximises density per channel
  • 288-pin RDIMM form factor validated for Supermicro H13SST-GC

Capacity and Fit

This 256GB kit contains two 128GB DDR5 RDIMM modules built for the Supermicro H13SST-GC motherboard. It targets administrators who need the exact rank, voltage and timing the board's memory controller expects for full-capacity recognition at rated speed.

Build and Connectors

Registered ECC architecture offloads the memory controller so every slot runs fully populated while ECC corrects single-bit errors on the fly. The 288-pin RDIMM form factor matches the board's required slot type; the modules have no heat spreader and operate at 1.1V.

Practical Limits

DDR5-6400 with CL52 latency sets the throughput ceiling for this platform when all channels are populated with 2Rx4 registered DIMMs. Maximum capacity and population order depend on the motherboard manual, which must be consulted before installation.

How it compares

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

Price $8,080.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.57 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 numberMR51200-724K2
Total capacity256 GB (2 × 128 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 items256 GB 2 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

What DDR5 speed and PC5 rating does this kit run at?

The kit operates at DDR5 6400 (PC5-51200), the rated transfer rate the Supermicro H13SST-GC memory controller will negotiate when all slots are populated with registered DIMMs.

What physical slot and form factor does this 256 GB kit require?

It uses the 288-pin RDIMM form factor; the Supermicro H13SST-GC only accepts registered DIMMs, so UDIMMs or SODIMMs will not fit or function.

How do I install the two 128 GB modules in the correct population order?

Consult the Supermicro H13SST-GC manual for the approved DIMM sequence, insert each RDIMM until the ejector tabs click, then verify full 256 GB recognition in BIOS before loading the OS.

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