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Four green DDR5 RDIMM modules without heat spreaders in a 128GB kit

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 6400MHz CL52 ECC RDIMM ASRock W890D8-2L2T

SKU CH-7APS-4KM8P

128 GB DDR5 kit with four 32 GB registered ECC modules at 6400 MHz CL52 for ASRock Rack W890D8-2L2T

  • Total capacity128 GB (4 × 32 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank2Rx8
  • ECC protection safeguards data integrity with registered DDR5 modules
  • 128 GB kit provides high capacity using four 32 GB sticks
  • 6400 MHz speed delivers fast throughput for server workloads
  • 1 V operation reduces power draw under load
  • Validated for ASRock Rack W890D8-2L2T motherboard compatibility

Purpose-built server kit

This 128GB kit targets administrators upgrading or populating the ASRock Rack W890D8-2L2T motherboard. It delivers four 32GB registered DDR5 modules with on-die ECC for data integrity in continuous workloads.

Build integration

The modules use the standard 288-pin DDR5 RDIMM form factor and operate at 1.10V, drawing power directly from the board’s memory slots. No heat spreaders are fitted, so airflow across the DIMM area must be provided by the chassis or CPU cooler.

Capacity and limits

The 2Rx8 organisation across four slots provides 128GB total at 6400MHz with CL52 latency, suited to virtualisation hosts and database nodes. Systems requiring more than four modules per channel or lower latency timings will need a different memory configuration.

How it compares

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

Price $4,991.99
Pricier than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $39.00 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 numberMR51200-328K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 RDIMM
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items128 GB (4 × 32 GB) DDR5 6400 MHz PC5-51200 2Rx8 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Does the CL52 latency limit throughput during sustained workloads?

CL52 is the rated CAS latency at 6400 MHz; actual sustained throughput depends on the memory controller and workload pattern.

How much heat and power does the 1.1 V kit draw when running all day?

Each module operates at 1.1 V DDR5 standard voltage; total power scales with all four 32 GB ranks under load.

Must the ASRock Rack W890D8-2L2T motherboard already be installed for this kit to work?

Yes, the kit is validated for the ASRock Rack W890D8-2L2T and requires that board's 288-pin DDR5 RDIMM slots.

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