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Two green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS700A-E12-RS4U 128GB (2x64GB) DDR5 4800 CL40 1.1V ECC RDIMM memory upgrade

SKU CH-PTA1-1W9C8 MPN RS700A-E12-RS4U

Dual 64 GB DDR5 4800 CL40 ECC registered DIMMs totalling 128 GB at 1.1 V for ASUS RS700A-E12-RS4U servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity with two 64 GB modules
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered design for error correction
  • CL40 CAS latency at 1.1 V operation
  • Validated for ASUS RS700A-E12-RS4U server

Capacity and configuration

This kit provides 128GB of DDR5 memory using two 64GB registered DIMMs. It runs at 4800 MT/s with a CAS latency of 40 at 1.10V. The modules are ECC registered with a 2Rx4 organisation and fit 288-pin slots.

Who this suits and who it does not

It is built for the ASUS RS700A-E12-RS4U dual-processor 1U server where the motherboard requires registered ECC DDR5. Builders using desktop boards, workstations that need unbuffered memory, or systems limited to lower capacities should look elsewhere.

Deciding specification

The registered ECC DDR5 interface with 2Rx4 organisation is the single factor that determines compatibility; only platforms that explicitly support registered DDR5 ECC RDIMMs can use this kit.

How it compares

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

Price $3,271.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $25.56 per GB
Pricier than about 70% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K2
Total capacity128 GB (2 × 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 items128 GB (2 × 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 288-pin DDR5 RDIMM form factor fit the ASUS RS700A-E12-RS4U server motherboard?

Yes, the 288-pin DDR5 RDIMM modules are built to match the DIMM slots on the ASUS RS700A-E12-RS4U 1U dual-processor server.

What is the correct way to install the two 64 GB modules for dual-channel operation?

Populate one module per CPU socket following the motherboard manual slot order; the common mistake is placing both modules on the same socket.

When should the registered ECC modules be replaced if correctable errors start appearing?

Replace the modules when the system logs show a rising correctable-error count or when the memory diagnostic reports persistent single-bit failures.

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