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Four green DDR5 RDIMM sticks in anti-static tray

NEMIX RAM

NEMIX RAM RS700A-E12-RS4U 256GB (4×64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-RBA0-1DQAW MPN RS700A-E12-RS4U

Four 64 GB DDR5 ECC registered DIMMs deliver 256 GB at 4800 MT/s for ASUS RS700A-E12-RS4U servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256GB total capacity across four 64GB modules for large server workloads
  • DDR5 4800 speed with CL40 latency for high-throughput registered memory
  • ECC registered RDIMM design protects data integrity in mission-critical systems
  • 1V operating voltage reduces power draw per 288-pin module
  • Validated compatibility with ASUS RS700A-E12-RS4U 1U dual-processor servers

System-Specific DDR5 RDIMM Kit

This 256GB kit contains four 64GB DDR5 4800 registered ECC modules built for the ASUS RS700A-E12-RS4U 1U dual-processor server. It targets administrators who need maximum capacity in a validated configuration for mission-critical workloads.

Verify Motherboard And Slot Population

Confirm the server is the exact RS700A-E12-RS4U model and that all twelve DDR5 slots can accept 2Rx4 registered DIMMs. Check the BIOS version against the ASUS qualified vendor list to ensure 4800 MT/s operation at 1.10V with CL40 timings.

Registered ECC Modules For Dense 1U Builds

The 288-pin RDIMMs plug directly into the server’s DDR5 slots without heat spreaders, preserving airflow in the 1U chassis. Registered buffering and on-die ECC maintain signal integrity across all four modules, freeing the memory controller from electrical load while protecting data integrity.

How it compares

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

Price $6,919.99
Pricier than about 83% 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 $27.03 per GB
Pricier than about 75% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 256GB kit include four 64GB modules or do I need to buy additional sticks?

The kit ships with four 64GB DDR5 4800 CL40 ECC registered DIMMs, giving 256GB total; no extra modules are required.

Should I choose this 4800 CL40 kit or a faster speed grade for the ASUS RS700A-E12-RS4U?

This 4800 CL40 kit matches the qualified memory list for the RS700A-E12-RS4U; faster grades are not validated for this platform.

What does the 4800 CL40 rating mean once the modules are installed in the server?

The memory will run at 4800 MT/s with a CAS latency of 40 cycles at 1.10 V, delivering PC5-38400 bandwidth per module.

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