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Four green DDR5 RDIMM sticks with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM DDR5 256GB (4x64GB) 6400MHz CL52 2Rx4 1.1V ECC RDIMM for Supermicro SYS-242B-NR

SKU CH-50S5-H9VA5

256GB registered DDR5 ECC kit with four 64GB modules at 6400MHz CL52 for Supermicro SYS-242B-NR servers

  • Total capacity256 GB (4 × 64 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank2Rx4
  • 256GB total capacity scales server workloads
  • 6400MHz DDR5 speed feeds data-intensive applications
  • CL52 latency keeps response tight
  • ECC registered design protects data integrity
  • 1V operation reduces power draw

256GB DDR5 ECC RDIMM kit for Supermicro SYS-242B-NR

This NEMIX RAM kit provides 256GB across four 64GB DDR5 registered DIMMs. It runs at 6400MHz with CL52 latency and operates at 1.1V. The modules use 2Rx4 organisation and include on-die ECC for data integrity. They are validated for the Supermicro MP SuperServer SYS-242B-NR platform.

Upgrade from lower-capacity or slower DDR5 RDIMMs

Replacing smaller DDR5 RDIMMs with this 256GB kit increases total memory bandwidth and allows larger in-memory datasets. The jump is worthwhile when workloads exceed current capacity or when 6400MHz speed reduces latency-bound stalls. Registered buffering maintains signal integrity across all four slots.

Suited for memory-intensive server workloads

This kit fits administrators scaling virtualisation, database or HPC nodes on the validated Supermicro system. Buyers who need unbuffered UDIMMs, non-ECC memory, or speeds beyond 6400MHz should look at something else. Systems requiring different pin counts or voltages are not compatible.

How it compares

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

Price $8,687.99
Pricier than about 85% 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 $33.94 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 numberMR51200-924K4
Total capacity256 GB (4 × 64 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 (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 SYS-242B-NR memory slots?

Yes, the kit uses 288-pin DDR5 RDIMM form factor which matches the Supermicro SYS-242B-NR DIMM slots.

What is the correct order to install the four 64 GB modules in the SYS-242B-NR?

Populate the four modules following the motherboard channel sequence shown in the Supermicro SYS-242B-NR manual; the common mistake is skipping a channel and leaving bandwidth unused.

When should the ECC RDIMM kit be replaced in a 24/7 server?

Replace modules if ECC correctable-error counters rise steadily or if the system logs uncorrectable memory errors during sustained operation.

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