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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM MR51200-744K4 512GB 4x128GB DDR5 6400 CL52 4Rx4 ECC RDIMM memory upgrade

SKU CH-BR1G-KF54K

512 GB DDR5-6400 registered ECC kit in four 128 GB modules at CL52 and 1.1 V for the Supermicro X14SDV-32C-SP3F motherboard

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

  • 512 GB total capacity with four 128 GB modules for maximum server density
  • DDR5 6400 speed and CL52 latency deliver rated throughput for demanding workloads
  • Registered ECC architecture corrects single-bit errors and stabilises fully populated slots
  • 1 V operation matches the platform specification for efficient power use
  • Verified compatibility with the Supermicro X14SDV-32C-SP3F motherboard ensures correct fit and recognition

Targeted server memory kit

This 512GB kit contains four 128GB DDR5 Registered ECC RDIMMs rated at 6400 MT/s with CL52 latency and 1.1V operation. It is built for administrators upgrading a Supermicro X14SDV-32C-SP3F motherboard that requires the exact 288-pin 4Rx4 registered modules this kit provides.

Replacing smaller or slower DIMMs

The jump is worth it when the platform supports full 512GB capacity and the memory controller expects DDR5-6400 registered ECC at 1.1V with 4Rx4 organisation. Installing lower-rank, higher-voltage or unbuffered modules instead would prevent the system from recognising the full capacity or running at the rated speed.

Straightforward installation with one critical check

Modules slot into the 288-pin RDIMM sockets in the order the motherboard manual specifies for quad-channel population. The most common issue is ignoring the vendor population table, which can leave the system posting at reduced capacity or failing to train at 6400 MT/s.

How it compares

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

Price $16,836.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $32.88 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 numberMR51200-744K4
Total capacity512 GB (4 × 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 items512 GB 4 × 128 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Will the 288-pin RDIMM modules fit the Supermicro X14SDV-32C-SP3F motherboard slots?

Yes, the 288-pin DDR5 RDIMM form factor matches the slots on the Supermicro X14SDV-32C-SP3F motherboard; UDIMM or SODIMM modules would not fit.

What is the correct population order when installing all four 128 GB modules?

Consult the Supermicro X14SDV-32C-SP3F manual for the approved DIMM population sequence; the board's memory-controller rules dictate which slots must be filled first for full 512 GB operation.

Does the 4Rx4 registered ECC design require any periodic maintenance or firmware updates?

No scheduled maintenance is needed; the registered ECC architecture handles error correction automatically, and the modules run at the specified 1.1 V without user intervention.

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