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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 CL40 1.1V ECC RDIMM ASRock WRX90 WS EVO memory upgrade

SKU CH-FZVD-EDN9N

A 128 GB kit of four 32 GB DDR5 4800 CL40 ECC registered DIMMs at 1.1 V, validated for the ASRock WRX90 WS EVO motherboard

  • Capacity128GB (4 x 32GB)
  • SpeedDDR5 4800 (PC5 38400)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V

Capacity 128GB 4X32GB

Show 3 more configurations
  • 128 GB total capacity with four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects memory errors
  • Low 1.10 V operation reduces power draw
  • Validated for ASRock WRX90 WS EVO motherboard

ASRock WRX90 WS EVO memory kit

This 128GB kit contains four 32GB DDR5 4800 RDIMM modules built for the ASRock WRX90 WS EVO motherboard. It targets workstation and server builders who need registered ECC memory for stability under sustained loads.

Installation notes and common issues

Modules are 288-pin DDR5 RDIMMs that seat in the board's standard slots; no heat spreader is fitted, so clearance is rarely a problem. The main risk is mixing these registered ECC sticks with unbuffered non-ECC memory, which the platform will not support.

Deciding specification: ECC registered DDR5 4800

The single factor that determines fit is the registered ECC DDR5 4800 specification; the board requires registered ECC modules and will not run unbuffered or non-ECC alternatives. Buyers needing standard desktop memory should look elsewhere.

Highlights

  • 128 GB total capacity with four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects memory errors
  • Low 1.10 V operation reduces power draw
  • Validated for ASRock WRX90 WS EVO motherboard

Specifications

BrandNEMIX RAM
SeriesASRock Server Motherboard Compatible Series Memory
ModelASRock DDR5 4800MHZ ECC RDIMM Registered Server Memory
Part NumberMR38400-314K4
Capacity128GB (4 x 32GB)
SpeedDDR5 4800 (PC5 38400)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemASRock
CAS LatencyCL40
Heat SpreaderNo
Type288-Pin DDR5 RDIMM
Rank1Rx4
FeaturesDDR5 ECC Registered RDIMM Server Motherboard Compatible
Package Content128GB (4X32GB) DDR5 4800MHZ PC5-38400 1Rx4 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How can I verify the 4800 MT/s speed and CL40 latency are active after installing the four 32 GB modules?

Enter the system BIOS or UEFI and confirm the memory frequency reads 4800 MT/s with timings showing CL40; the registered ECC design will also report corrected errors in the OS event logs if it is functioning correctly.

What exactly ships in the MR38400-314K4 kit and are any extra parts required for the ASRock WRX90 WS EVO?

The box contains four 288-pin DDR5 RDIMMs totalling 128 GB; no additional brackets, cables or cooling accessories are needed for installation on the compatible motherboard.

Why choose this 128 GB quad-rank kit over a smaller capacity for the WRX90 WS EVO?

Four 32 GB 1Rx4 modules populate four channels for maximum bandwidth at 4800 MT/s while keeping each DIMM at a single rank, which the platform handles efficiently at the rated 1.1 V.

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