We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two green 288-pin DDR5 RDIMM modules, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 CL40 4Rx4 ECC RDIMM ASUS Pro WS WRX90E SAGE SE memory upgrade

SKU CH-WSKD-9PVDA

256 GB kit of two 128 GB DDR5 4800 CL40 4Rx4 ECC registered RDIMMs at 1.1 V, validated for ASUS Pro WS WRX90E SAGE SE workstations

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 256GB 2X128GB

Show 3 more
  • 256 GB total capacity from two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered RDIMM protects data integrity
  • 4Rx4 quad-rank organisation for high density
  • 1 V operating voltage reduces power draw

ASUS Pro WS WRX90E SAGE SE compatible DDR5 kit

This 256GB kit contains two 128GB DDR5 RDIMMs validated for the ASUS Pro WS WRX90E SAGE SE workstation motherboard. It targets professionals who need maximum registered ECC capacity for memory-intensive server workloads. Each module operates at 1.10V with CL40 latency.

DDR5 4800 bandwidth ceiling for registered ECC

The PC5-38400 interface caps peak throughput at 38400 MB/s per module, which is the practical limit for DDR5 4800 registered memory. Registered buffering adds one cycle of command delay, so latency-sensitive tasks see higher effective latency than unbuffered alternatives. The 288-pin form factor fits only DDR5 RDIMM slots.

4Rx4 rank density decides platform support

Each 128GB module uses a 4Rx4 organisation, placing four logical ranks behind a single x4 device width. This density requires a motherboard memory controller and BIOS that explicitly support quad-rank registered DIMMs. Systems limited to dual-rank or single-rank modules cannot use this kit.

How it compares

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

Price $7,572.99
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 $29.58 per GB
Pricier than about 84% 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 numberMR38400-744K2
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

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 256 GB kit with two 128 GB modules or a different capacity for my ASUS Pro WS WRX90E SAGE SE?

This kit provides 256 GB total using two 128 GB RDIMMs, which matches the board's DDR5 RDIMM requirements and fills two slots for optimal channel population.

What does the DDR5 4800 CL40 rating mean once the modules are installed in the workstation?

The memory will run at 4800 MT/s with a CAS latency of 40 cycles, delivering PC5-38400 bandwidth for server workloads.

How does the 288-pin DDR5 RDIMM interface and registered design affect what the system can use?

The 288-pin DDR5 RDIMM form factor with registered buffering and ECC is required by the WRX90E SAGE SE; the registered design reduces electrical load so the platform can support high-capacity 4Rx4 modules at 1.1 V.

More in Model-Specific Memory Upgrades

Similar items