We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Six green DDR5 RDIMM modules in static bags

NEMIX RAM

NEMIX RAM 768GB (6×128GB) DDR5 6400 CL52 1.1V 2Rx4 ECC Registered RDIMM for Supermicro H14DST-FL

SKU CH-K021-CP07S

A 768GB DDR5 6400 CL52 1.1V ECC Registered RDIMM kit of six 128GB 2Rx4 modules validated for the Supermicro H14DST-FL motherboard

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 768 GB total capacity from six 128 GB modules
  • DDR5 6400 speed with CL52 latency for rated performance
  • 10 V operation matches the server memory controller spec
  • Registered ECC RDIMM design prevents silent data corruption
  • 288-pin 2Rx4 form factor verified for Supermicro H14DST-FL

Exact-match DDR5 RDIMM kit

This 768 GB kit contains six 128 GB DDR5 6400 registered ECC modules built to the Supermicro H14DST-FL memory controller specification. Each module runs at 1.1 V with CL52 timing and a 2Rx4 rank structure so the board recognises the full capacity at rated speed without manual tuning.

Capacity and headroom

Six populated slots deliver 768 GB of registered memory for multi-socket workloads that scale across every channel. The registered architecture keeps the memory controller stable when all slots are filled, while ECC corrects single-bit errors before they affect production data. Populations beyond the board's validated maximum or mixed-rank configurations are not supported.

Build and daily implications

Modules use major OEM Samsung, Micron or Hynix chips without heat spreaders, relying on server chassis airflow for cooling. The 288-pin RDIMM form factor fits only registered DIMM slots; UDIMM or SODIMM boards will not accept them. Installation must follow the motherboard manual's population order to achieve full capacity and rated 6400 MT/s operation.

How it compares

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

Price $24,988.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $32.54 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-724K6
Total capacity768 GB (6 × 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 items768 GB 6 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Will the 6400 1.1V 2Rx4 RDIMM kit run at rated speed in the remaining slots of my H14DST-FL if I keep the existing 128GB modules?

The kit is spec-matched to the H14DST-FL memory population rules; install it in the approved slot order and the board will recognise the full 768GB capacity at DDR5-6400 CL52.

How can I confirm the 768GB kit is operating at CL52 with ECC active after installation?

Check the BIOS memory information screen — it should report 768GB total, DDR5-6400 speed, CL52 latency and ECC enabled for each of the six 128GB RDIMMs.

Does the MR51200-724K6 package include the six 128GB RDIMMs only, or are any cables or brackets supplied?

The box contains exactly the 768GB 6×128GB DDR5-6400 CL52 1.1V 2Rx4 288-pin ECC Registered RDIMM kit; no cables, brackets or other accessories are included.

More in Model-Specific Memory Upgrades

Similar items