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Green printed circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 128GB DDR5 6400MHz PC5-51200 2Rx4 CL52 1.1V 288-Pin ECC Registered RDIMM memory upgrade

SKU CH-7169-0X138

A 128 GB DDR5 registered ECC module running at 6400 MHz with CL52 latency and 1.1 V for Supermicro H13SRA motherboards

  • Total capacity128 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB

Show 6 more
  • Full-speed 128 GB DDR5-6400 operation with exact CL52 timing the memory controller expects
  • Registered 2Rx4 ECC design offloads the controller so every slot runs fully populated at rated capacity
  • 1 V DDR5 voltage and 288-pin RDIMM form factor match the board's electrical and mechanical requirements
  • Verified fit for Supermicro H13SRA-F and H13SRA-TF motherboards with correct population rules
  • Major OEM Samsung, Micron or Hynix chips deliver enterprise-grade stability for production workloads

Exact DDR5-6400 Registered ECC Module

This 128 GB DDR5 RDIMM runs at 6400 MHz (PC5-51200) with a CL52 latency and 1.1 V operating voltage. The 2Rx4 registered design adds a buffer that lets the memory controller drive every populated slot at full rated speed. It is built for Supermicro H13SRA-F and H13SRA-TF motherboards that require 288-pin registered ECC memory.

DDR5 RDIMM Population Rules Apply

Registered DDR5 modules still follow the motherboard's qualified-vendor list and slot-population order; exceeding the approved ranks per channel or mixing ranks can prevent the system from posting at 6400 MHz. The board's memory controller must also support 128 GB single-DIMM capacity, which varies by BIOS revision and CPU SKU. Always verify the manual before installing.

2Rx4 Rank Determines Full-Speed Operation

The dual-rank x4 organisation is the single specification that decides whether this module will run at its rated 6400 MHz when all slots are filled. A different rank or width would change the electrical load and could force the controller to downclock the memory bus.

How it compares

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

Price $4,311.99
Pricier than about 78% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $33.69 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 numberMR51200-724K1
Total capacity128 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 items128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Should I pick the 128 GB 2Rx4 kit or look for a different capacity for my Supermicro H13SRA-F?

This kit is a single 128 GB 2Rx4 Registered ECC RDIMM. Check your motherboard manual for the maximum capacity per slot and the approved population order before deciding.

Will the DDR5-6400 CL52 rating actually run at 6400 MT/s in my H13SRA-TF?

The module is specified at 6400 MT/s (PC5-51200) with CL52 at 1.10 V. Your board must support DDR5-6400 and the 2Rx4 Registered layout to reach that speed; otherwise it will downclock to the highest common setting.

Does the 288-pin RDIMM interface limit how many modules I can install per channel?

The 288-pin Registered DDR5 RDIMM form factor is required by the H13SRA-F and H13SRA-TF. Each module presents a 2Rx4 load; total DIMMs per channel is governed by the motherboard's memory-controller limits, not the pin count itself.

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