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Eight green DDR5 RDIMM modules in static bags

NEMIX RAM

NEMIX RAM 256GB (8x32GB) DDR5 6400 CL52 2Rx8 1.1V ECC Registered RDIMM memory upgrade for Supermicro H14SHM

SKU CH-RZ75-24AW2

Eight 32 GB DDR5 modules provide 256 GB of registered ECC memory at 6400 MT/s with CL52 timing for the Supermicro H14SHM motherboard

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256 GB total capacity from eight 32 GB modules for dense server workloads
  • DDR5 6400 speed with CL52 latency keeps data moving at rated throughput
  • 10 V operation reduces power draw across fully populated slots
  • Registered ECC design corrects single-bit errors and stabilises every channel
  • 288-pin RDIMM form factor matches Supermicro H14SHM memory population rules

Exact-fit DDR5-6400 RDIMM kit

This 256 GB kit contains eight 32 GB DDR5-6400 modules built to the PC5-51200 standard. Each stick is a 288-pin registered ECC RDIMM running at 1.1 V with CL52 latency and a 2Rx8 organisation. The kit is validated for the Supermicro H14SHM motherboard so the memory controller recognises the full population at rated speed.

DDR5 registered ECC constraints

Registered DIMMs add a buffer that lets the memory controller drive all slots at full capacity, while on-die ECC corrects single-bit errors before they reach the operating system. The DDR5 interface used here operates at 1.1 V and requires a motherboard wired for 288-pin RDIMMs; it will not fit UDIMM or SODIMM slots and cannot be mixed with unbuffered or non-ECC modules.

Upgrade path and fitment check

The kit replaces any smaller-capacity or slower DDR5 RDIMM set currently installed in the H14SHM, provided the board's population rules allow eight modules. Builders who need more than 256 GB total or who require a different rank configuration should verify the motherboard manual first, as this kit does not address those requirements.

How it compares

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

Price $9,770.99
Pricier than about 87% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $38.17 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 numberMR51200-328K8
Total capacity256 GB (8 × 32 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 rank2Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 8 × 32 GB DDR5 6400 MHz PC5-51200 2Rx8 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Should I buy this 256GB kit or a smaller capacity for my Supermicro H14SHM?

This kit provides 256GB across eight 32GB modules. Choose it when your workload needs the full capacity and your motherboard manual confirms eight-slot population at DDR5 6400.

Will this kit actually run at DDR5 6400 CL52 once installed?

The modules are rated for DDR5 6400 (PC5 51200) with CL52 timings at 1.1V. The Supermicro H14SHM memory controller will operate them at that speed when the BIOS is set to the rated profile and all eight slots are populated per the board's population rules.

Does the 288-pin RDIMM form factor and registered ECC design limit what the board can do?

The 288-pin Registered ECC RDIMM format is exactly what the H14SHM requires. Registered buffering lets all eight slots run fully populated at the rated 6400 speed, while ECC corrects single-bit errors on the fly.

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