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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 6400 CL52 4Rx4 1.1V ECC RDIMM Supermicro X14SDV-32C-SP3F memory upgrade

SKU CH-38XH-R8SYF

256GB DDR5-6400 ECC RDIMM kit in four 64GB 4Rx4 modules at 1.1V CL52, validated for the Supermicro X14SDV-32C-SP3F motherboard

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 4X64GB

  • 256 GB total capacity from four 64 GB modules
  • DDR5 6400 speed with CL52 latency for rated throughput
  • 1 V registered ECC design protects data integrity
  • 4Rx4 organisation enables full population on supported boards
  • 288-pin RDIMM form factor matches Supermicro X14SDV-32C-SP3F requirements

Exact-fit DDR5 ECC RDIMM kit

This 256GB kit contains four 64GB DDR5-6400 registered ECC modules built for the Supermicro X14SDV-32C-SP3F motherboard. Each DIMM runs at 1.1V with CL52 latency and a 4Rx4 organisation. The registered design lets the board run fully populated without overloading the memory controller.

4Rx4 registered ECC at 6400 MT/s

The single specification that decides fitment is the 4Rx4 registered ECC profile at DDR5-6400 (PC5-51200). Your motherboard must accept 288-pin RDIMMs with exactly that rank, voltage and timing; a UDIMM, SODIMM or different rank count will not be recognised. Verify the manual’s approved population table before ordering.

Tool-free press-in install

Align the notch on each 288-pin module with the slot key, press straight down until both latches click, and repeat for all four slots in the order the manual specifies. The most common issue is mixing ranks or skipping a required slot sequence, which leaves capacity unrecognised or forces the system to run at a lower speed.

How it compares

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

Price $8,174.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.93 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 numberMR51200-944K4
Total capacity256 GB (4 × 64 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 4 × 64 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

What does the 6400 MT/s rating mean once the modules are installed in a Supermicro X14SDV-32C-SP3F?

The kit runs at DDR5-6400 (PC5-51200) with CL52 latency at 1.1 V, so the memory controller recognises all 256 GB at the rated speed without down-clocking.

How does the 288-pin RDIMM interface and registered design affect what the motherboard can use?

The board requires 288-pin registered DIMMs; the buffered architecture lets every slot stay fully populated at 64 GB per module while ECC corrects single-bit errors on the fly.

What physical clearance or slot population rules apply when fitting the four 64 GB sticks?

Each module is a standard-height 288-pin RDIMM with no heat spreader; follow the X14SDV-32C-SP3F manual for the approved DIMM population order before installing all four.

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