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
Two green 288-pin DDR5 RDIMM modules, no heat spreaders

NEMIX RAM

NEMIX RAM DDR5 4800 256GB (2x128GB) ECC RDIMM CL40 1.1V 2Rx4 Supermicro H14DSH memory upgrade

SKU CH-1BWN-2AAM5

256 GB DDR5 4800 ECC registered RDIMM kit (2 × 128 GB, CL40, 1.1 V, 2Rx4) validated for Supermicro H14DSH motherboards

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

Show 30 more
  • 256 GB capacity across two 128 GB modules for dense server workloads
  • DDR5 4800 speed with CL40 latency matches the board's rated timing
  • 1 V operation and 2Rx4 registered ECC design reduces electrical load on the memory controller
  • 288-pin RDIMM form factor verified for Supermicro H14DSH motherboard compatibility
  • Lifetime replacement warranty with US-based technical support included

Exact-match DDR5-4800 kit

This 256GB kit contains two 128GB DDR5 4800 RDIMMs built to the precise 2Rx4 registered ECC specification the Supermicro H14DSH memory controller expects. It installs at the rated 1.1V and CL40 timing so every slot is recognised at full capacity without manual tuning.

Registered ECC architecture

Registered buffering offloads the memory controller, allowing all populated slots to run at the full 256GB capacity while on-die ECC corrects single-bit errors before they reach the operating system. The result is uninterrupted uptime for workloads that cannot tolerate silent data corruption.

288-pin RDIMM form factor

The modules use the 288-pin RDIMM form factor required by the H14DSH, not UDIMM or SODIMM, so they seat correctly in the server's DIMM slots. Population order and maximum supported capacity still 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 $7,769.99
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 $30.35 per GB
Pricier than about 87% 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 numberMR38400-724K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
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 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

5 more in the same range

Questions about this item

Will the 2Rx4 registered ECC modules need any firmware updates or periodic replacement?

The modules are built with major OEM Samsung, Micron or Hynix DRAM and carry a lifetime replacement warranty; no firmware updates or scheduled replacement are required.

What is the first limit reached when the 256 GB kit runs continuously at DDR5-4800 CL40?

The CAS latency of CL40 and the 1.1 V operating voltage set the timing and power envelope that the memory controller hits before any thermal throttle on these bare modules.

How much heat and noise do the 128 GB RDIMMs produce under all-day load without a heat spreader?

With no heat spreader the bare DRAM runs at 1.1 V, so power draw stays low and the modules add only passive heat to the server's existing airflow, generating no audible noise themselves.

More in Model-Specific Memory Upgrades

Similar items