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Two green DDR5 RDIMM modules with gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 6400MHz CL52 4Rx4 1.1V ECC RDIMM Supermicro X14SBI-F memory upgrade

SKU CH-4QZP-PRSKD

A 128 GB dual-channel DDR5 6400 MHz ECC RDIMM kit built for the Supermicro X14SBI-F

  • Total capacity128 GB (2 × 64 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank4Rx4
  • 128GB total capacity for heavy server workloads
  • DDR5 6400MHz speed with CL52 latency
  • ECC registered design protects data integrity
  • 1V operation reduces power draw
  • Validated for Supermicro X14SBI-F compatibility

Capacity and purpose

This 128 GB DDR5 kit contains two 64 GB ECC RDIMM modules rated at 6400 MHz CL52 and 1.1 V. It is built for the Supermicro X14SBI-F platform and targets administrators who need registered, error-correcting memory for server or workstation workloads.

Fit and limits

The kit suits IT teams deploying memory in the validated Supermicro X14SBI-F system where 4Rx4 registered DIMMs are required. Buyers who need unbuffered UDIMMs, non-ECC modules, a different pin count, or capacities outside the 2 x 64 GB configuration should look at other products.

Installation notes

Installation follows the standard 288-pin DDR5 RDIMM procedure and typically takes minutes per the manufacturer guidance. Common issues include failing to seat both modules fully in the correct slots, mixing ranks or speeds with existing DIMMs, and skipping the BIOS memory training step that registered memory often requires.

How it compares

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

Price $4,231.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $33.06 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 lineSupermicro Compatible Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server RAM
Part numberMR51200-944K2
Total capacity128 GB (2 × 64 GB)
Product type288-PIN DDR5 RDIMM
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (2 × 64 GB) DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Does the Supermicro X14SBI-F motherboard need a specific BIOS version to recognise the 6400MHz CL52 4Rx4 RDIMM kit?

The kit is designed for the Supermicro X14SBI-F and uses standard DDR5 JEDEC 6400MHz timings, so the board will detect it at supported speeds with a current BIOS.

Can I mix these 4Rx4 registered ECC modules with older 2Rx8 DDR5 RDIMMs already installed in the server?

Mixing different rank organisations (4Rx4 vs 2Rx8) on the same channel is not recommended; populate each channel with identical modules for stable operation.

How do I confirm the 128GB kit is running at 6400MHz with ECC active after installation?

Check the POST memory summary or the BIOS memory information screen — it will show 128GB total, 6400MHz speed, and ECC enabled for each DIMM.

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