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Four green DDR5 RDIMM modules without heat spreaders in a 256GB kit

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 6400 CL52 1.1V ECC RDIMM Supermicro H13SSL-NT memory upgrade

SKU CH-84XS-XFRX3

A 256 GB DDR5 ECC RDIMM kit of four 64 GB modules running at 6400 MT/s with CL52 latency and 1.1 V, registered for full-capacity stability on the Supermicro H13SSL-NT 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
  • Exact-match DDR5-6400 kit installs at rated speed with CL52 timing and 1.1 V operation
  • Four 64 GB modules deliver 256 GB total capacity in a single kit
  • Registered ECC RDIMM architecture corrects single-bit errors for enterprise stability
  • 2Rx4 dual-rank organisation matches Supermicro H13SSL-NT memory population rules
  • 288-pin DDR5 form factor fits the board's registered DIMM slots precisely

Exact-fit DDR5 server kit

This NEMIX RAM kit delivers 256GB across four 64GB DDR5 RDIMM modules rated at 6400 MT/s with CL52 latency. Registered ECC architecture and 1.1V operation match the Supermicro H13SSL-NT motherboard requirements for full-capacity recognition and stable operation.

Replaces mixed or slower DIMMs

Swapping out partial populations or lower-speed modules with this matched 4x64GB kit ensures the memory controller sees identical rank, voltage and timing across every slot. The jump is worth it when your workload demands maximum registered ECC capacity at the board's native DDR5-6400 specification.

Suits Supermicro H13SSL-NT deployments

Administrators populating all available RDIMM slots on this specific platform gain verified compatibility and enterprise-grade error correction. Builders needing UDIMM, SODIMM or non-ECC memory for other systems should look elsewhere, as this kit is purpose-built for registered DDR5 server boards only.

How it compares

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

Price $7,794.99
Pricier than about 84% 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 $30.45 per GB
Pricier than about 87% 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 numberMR51200-924K4
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 rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 4 × 64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules fit the Supermicro H13SSL-NT motherboard slots?

Yes, the kit uses the exact 288-pin Registered DDR5 form factor that the H13SSL-NT requires; it is not a UDIMM or SODIMM so it seats directly in the board's DDR5 RDIMM slots.

What is the correct population order for the four 64 GB 2Rx4 modules on the H13SSL-NT?

Install the modules in the sequence specified by the Supermicro H13SSL-NT manual — typically filling the primary channel slots first — so the memory controller recognises the full 256 GB at DDR5-6400 CL52.

Do these 1.1 V registered ECC RDIMMs need any firmware updates or periodic re-seating over their service life?

No firmware updates are required for the memory itself; the modules are validated for continuous operation at 1.1 V with on-die ECC, and the registered design maintains signal integrity without scheduled re-seating.

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