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Two green DDR5 RDIMM modules in anti-static packaging

NEMIX RAM

NEMIX RAM RS700-E11-RS12U 256GB (2x128GB) DDR5 4800 ECC RDIMM memory upgrade

SKU CH-89RF-676RY MPN RS700-E11-RS12U

Dual 128 GB DDR5 4800 ECC registered modules totalling 256 GB for ASUS RS700-E11-RS12U servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity with two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity in servers
  • 1 V operating voltage reduces power draw
  • Validated for ASUS RS700-E11-RS12U 1U dual-socket server

System-specific DDR5 ECC RDIMM kit

This 256 GB kit contains two 128 GB registered DDR5 modules built for the ASUS RS700-E11-RS12U 1U dual-socket server. Each module runs at 4800 MT/s with a CAS latency of CL40 and operates at 1.10 V. The 4Rx4 organisation and on-die ECC protect data integrity in mission-critical workloads.

Thermals power and acoustics

The modules have no heat spreader, relying on the server’s directed airflow for cooling. Registered buffering reduces electrical load on the memory controller, helping keep system power draw predictable under sustained load. Silent operation is inherent because no active cooling is attached to the DIMMs themselves.

What the kit changes

Installing the matched pair populates two slots with validated capacity, eliminating guesswork about rank interleaving or voltage compatibility. The pre-tested 288-pin RDIMM format ensures the server recognises the full 256 GB at POST without manual timing adjustments.

How it compares

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

Price $7,743.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $30.25 per GB
Pricier than about 86% 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 numberMR38400-744K2
Total capacity256 GB (2 × 128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules in the ASUS RS700-E11-RS12U server, and what step is often missed?

Power down the server, open the chassis, align each 128GB module with the DDR5 slot key, press firmly until the ejector clips lock, then verify in BIOS that both 4Rx4 modules are detected at 4800 MT/s.

What maintenance or replacement will the registered ECC DDR5 kit need during its service life?

The modules have no heat spreaders and no moving parts; run periodic memory diagnostics and keep firmware current — no scheduled replacement is required unless a module fails ECC correction.

What limit appears first when the 256GB kit runs sustained workloads at 1.1V CL40?

The CAS 40 latency and 4Rx4 rank density set the throughput ceiling; sustained bandwidth is capped by the DDR5 4800 MT/s rating and the server memory controller.

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