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Two green DDR5 RDIMM modules with black chips, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400 CL52 ECC RDIMM SuperMicro SYS-222BT-HER memory upgrade

SKU CH-Y1YV-5YANN

256 GB kit of two 128 GB DDR5 6400 CL52 ECC RDIMM modules for SuperMicro SYS-222BT-HER servers

  • Total capacity256 GB (2 × 128 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank2Rx4
  • 256 GB kit expands server capacity with two 128 GB modules
  • DDR5 6400 speed feeds data to SuperMicro BigTwin SYS-222BT-HER
  • ECC registered design protects data integrity in critical workloads
  • 1 V operation reduces power draw per module
  • 2Rx4 288-pin RDIMM layout fits qualified memory slots

System-specific DDR5 ECC RDIMM kit

This 256 GB kit contains two 128 GB registered DDR5 modules built for the SuperMicro BigTwin SuperServer SYS-222BT-HER. Each module runs at 6400 MHz with CL52 latency at 1.1 V and uses a 2Rx4 organisation. The ECC RDIMM design targets enterprise workloads that require error correction and registered signalling.

Verify DIMM slots and population rules

Confirm the server has enough free 288-pin DDR5 RDIMM slots for two modules and check the platform's qualified-vendor list for 6400 MHz registered parts. The motherboard manual defines maximum capacity per channel and any required slot-filling order. Ensure the system BIOS is at a version that supports this memory speed and density.

Kit delivers matched-pair reliability

The two modules are packaged together as a tested pair, so they share identical timings, voltage and rank configuration. This reduces the risk of mismatch errors during multi-channel training. No heat spreaders are included, so airflow in the chassis must meet the server vendor's cooling guidelines for bare DRAM.

How it compares

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

Price $8,434.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $32.95 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 numberMR51200-724K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB (2 × 128 GB) DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Does the kit include both 128 GB modules or do I need to buy a second stick?

The kit ships as a matched pair of two 128 GB modules, giving 256 GB total with nothing extra to purchase.

Why choose the 256 GB CL52 2Rx4 kit instead of a smaller capacity?

The 2Rx4 organisation on each 128 GB module delivers the full 256 GB at 6400 MT/s while keeping latency at CL52 and voltage at 1.1 V.

What does the 6400 MT/s rating mean once the modules are installed in the SuperMicro SYS-222BT-HER?

The server will run the memory at 6400 MT/s with ECC and registered buffering active, providing 51200 MB/s bandwidth per channel at the rated CL52 timing.

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