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 DDR5 RDIMM modules without heat spreaders, 288-pin, 256GB kit

NEMIX RAM

NEMIX RAM DDR5 256GB 2x128GB 6400MHz CL52 1.1V 4Rx4 ECC Registered RDIMM memory upgrade

SKU CH-0N5M-5BZGT

A 256GB dual-module kit of DDR5 6400MHz ECC Registered RDIMM memory built for the Supermicro X14SDV-32C-SP3F 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

Size 256GB 2X128GB

  • 256 GB total capacity from two 128 GB modules for dense server memory configurations
  • DDR5 6400 speed with CL52 latency delivers rated throughput for compatible platforms
  • Registered ECC architecture corrects single-bit errors and buffers signals for stable full-population operation
  • 10 V operating voltage matches the memory controller specification for reliable recognition
  • 288-pin RDIMM form factor fits the Supermicro X14SDV-32C-SP3F motherboard slot requirements

Exact-match DDR5 server kit

This NEMIX RAM kit delivers 256 GB of DDR5-6400 registered ECC memory in a matched pair of 128 GB 288-pin RDIMMs. It is built for the Supermicro X14SDV-32C-SP3F motherboard and meets the board's strict rank, voltage and timing requirements. The 4Rx4 organisation and CL52 latency let the memory controller recognise full capacity at rated speed without manual tuning.

Thermals power and noise

Operating at 1.1 V the modules draw minimal power for their density and run without heat spreaders in the server's managed airflow. Registered buffering reduces electrical load on the memory controller so every slot stays stable when fully populated. No active cooling is present so acoustic output depends entirely on the chassis fans.

4Rx4 registered ECC constraint

The 4Rx4 registered ECC layout is the single specification that decides fitment; the motherboard must support this exact rank configuration and registered DIMM type. Systems that require UDIMMs, SODIMMs or a different rank structure will not accept these modules. Always verify the board's qualified vendor list and population rules before installation.

How it compares

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

Price $9,536.99
Pricier than about 86% 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 $37.25 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 numberMR51200-744K2
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 rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 2 × 128 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules into the Supermicro X14SDV-32C-SP3F motherboard, and what step is often missed?

Power down the server, open the chassis, and insert each 128 GB module into the slots specified by the board's population guide until the ejector clips click; the step most often missed is checking the manual for the exact slot order required when all channels are populated.

What maintenance or replacement will this 256 GB DDR5 ECC RDIMM kit need over its service life?

No scheduled maintenance is required; the modules have no heat spreaders or moving parts, so only a failed DIMM would need replacement, which is covered by the lifetime replacement warranty.

What limit appears first when the 4Rx4 registered DDR5 6400 kit runs sustained workloads on this platform?

The memory controller's maximum supported capacity and rank-per-channel limit for the X14SDV-32C-SP3F will be reached before the modules' own 6400 MT/s speed or 1.1 V voltage ceiling becomes a constraint.

More in Model-Specific Memory Upgrades

Similar items