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Two green DDR5 RDIMM modules with black chips, no heat spreader, 288-pin form factor

NEMIX RAM

NEMIX RAM RS700-E11-RS4U 256GB (2x128GB) DDR5 4800 ECC RDIMM memory upgrade

SKU CH-KGFC-WCCA9 MPN RS700-E11-RS4U

A 256GB registered DDR5 kit with ECC, 4800 speed and CL40 latency for ASUS RS700-E11-RS4U 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
  • 256GB total capacity with two 128GB modules for high-density server workloads
  • DDR5 4800 speed rated at PC5-38400 for fast data throughput
  • ECC registered RDIMM design detects and corrects memory errors automatically
  • 1V operating voltage reduces power draw in dense configurations
  • Validated for ASUS RS700-E11-RS4U 1U dual-socket server compatibility

256 GB DDR5 ECC RDIMM kit

This kit provides 256 GB of DDR5 4800 registered ECC memory in two 128 GB modules. It is built for the ASUS RS700-E11-RS4U dual-socket 1U server and targets IT teams running virtualisation, databases or high-throughput workloads that require maximum capacity per slot.

288-pin registered design with 4Rx4 organisation

The modules use a 288-pin RDIMM form factor with 4Rx4 rank architecture and operate at 1.10 V. Registered buffering reduces electrical load on the memory controller, allowing dense population in the server’s limited DIMM slots while maintaining signal integrity at 4800 MT/s.

CL40 latency at 1.1 V nominal voltage

Rated CAS latency is CL40 at the standard DDR5 4800 speed grade. The low 1.1 V operating voltage helps contain power draw and heat output inside a 1U chassis where airflow is constrained, supporting stable operation under sustained load without additional cooling hardware.

How it compares

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

Price $8,346.99
Pricier than about 85% 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 $32.61 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 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

Does DDR5 4800 (PC5-38400) cap the memory bus at 4800 MT/s on this server?

Yes, the kit is rated for DDR5 4800 which runs at 4800 MT/s on the RS700-E11-RS4U memory controller.

What physical slot and module dimensions are required for the 288-pin RDIMMs?

Each 128 GB module uses a standard 288-pin DDR5 RDIMM form factor that fits the server’s registered DIMM sockets.

How are the two 128 GB sticks installed, and which step is often missed?

Populate the two modules in the correct channel pair per the ASUS manual and ensure each RDIMM clicks fully into its 288-pin socket.

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