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Two green DDR5 RDIMM modules, bare chips, no heat spreaders

NEMIX RAM

NEMIX RAM RS720QA-E12-RS8U 128GB (2x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-PNMF-8ZYY1 MPN RS720QA-E12-RS8U

128 GB dual-rank DDR5-4800 ECC registered RDIMM kit (2 × 64 GB, CL40, 1.1 V) validated for ASUS RS720QA-E12-RS8U rack 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 DDR5 4800 server kit with ECC for data integrity
  • Registered 2Rx4 modules stabilise heavy multi-threaded workloads
  • 1 V DDR5 voltage reduces power draw per module
  • ASUS RS720QA-E12-RS8U validated compatibility ensures error-free boot
  • Major OEM Samsung, Micron, Hynix chips deliver enterprise-grade reliability

128 GB DDR5 ECC RDIMM kit

This 128 GB kit contains two 64 GB DDR5 4800 registered DIMMs built for the ASUS RS720QA-E12-RS8U high-density 2U4N rack server. It targets IT teams that need validated ECC memory for mission-critical workloads in that specific platform.

288-pin registered modules for dense server chassis

Each module is a 2Rx4 288-pin RDIMM operating at 1.10 V, designed to populate the server’s memory slots without extra cooling hardware. The registered buffer and on-die ECC free the memory controller from parity overhead, leaving more bandwidth for virtualization and database tasks.

CL40 latency at sustained 4800 MT/s throughput

Rated at PC5-38400 with CAS latency 40, the kit maintains its rated speed under continuous load thanks to major-brand Samsung, Micron or Hynix ICs that are stress-tested before shipment. The combination of registered signalling and ECC correction keeps error rates low during extended compute runs.

How it compares

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

Price $3,154.99
Pricier than about 73% 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 $24.65 per GB
Pricier than about 69% 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 numberMR38400-924K2
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

Will the CL40 latency limit throughput when the server runs heavy workloads continuously?

CL40 is the rated CAS latency for these DDR5 4800 modules; sustained heavy workloads will operate at this timing.

How much heat do two 64 GB registered DIMMs produce at 1.1 V during all-day operation?

Each module runs at 1.10 V without a heat spreader; registered DDR5 DIMMs of this density typically stay within normal server thermal limits.

Does the ASUS RS720QA-E12-RS8U motherboard need a specific BIOS revision to recognise this 128 GB kit?

The kit is built for the ASUS RS720QA-E12-RS8U 2U4N rack server; consult the motherboard manual for any required BIOS version.

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