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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM ASRock WRX90 WS EVO memory upgrade

SKU CH-SAZ6-67EAW

A 256 GB kit of four 64 GB DDR5 4800 CL40 ECC registered DIMMs validated for the ASRock WRX90 WS EVO motherboard

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 256GB 4X64GB

Show 3 more
  • Massive 256GB capacity handles extreme workloads
  • DDR5 4800 speed delivers high bandwidth
  • ECC registered design protects data integrity
  • 1V operation reduces power draw
  • Validated for ASRock WRX90 WS EVO compatibility

System-specific DDR5 kit for ASRock WRX90 WS EVO

This 256GB kit contains four 64GB DDR5 RDIMMs validated for the ASRock WRX90 WS EVO motherboard. Modules run at 4800MT/s with CL40 latency at 1.1V. Registered ECC design targets workstation and server workloads that require error correction.

Replaces non-ECC or lower-capacity DDR5

The jump is worth it when applications need registered ECC stability across four channels and total capacity beyond standard consumer limits. Systems already running DDR5 4800 without ECC or with fewer ranks gain data integrity and density without changing platform.

Fills four DDR5 RDIMM slots on the WRX90 WS EVO

Each module is a 288-pin 2Rx4 registered DIMM without a heat spreader, leaving clearance for CPU coolers. The kit occupies all slots for quad-channel operation at the rated speed. Buyers who need more than 256GB or non-registered memory cannot use this configuration.

How it compares

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

Price $6,674.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $26.07 per GB
Pricier than about 72% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASRock Server Motherboard Compatible Series Memory
Model nameASRock DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K4
Total capacity256 GB (4 × 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 systemsASRock
In the box
Included items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

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Questions about this item

How many 288-pin DDR5 slots does the ASRock WRX90 WS EVO need free for this 4-module kit?

The kit contains four 64GB modules, so four DDR5 RDIMM slots must be available on the WRX90 WS EVO motherboard.

What BIOS setting should be checked after seating the 1.10V CL40 RDIMMs to confirm they run at 4800 MT/s?

Enter the BIOS and verify the memory frequency shows 4800 MT/s and the voltage reads 1.10V; enable any XMP or EXPO profile if the board offers one for registered ECC DIMMs.

When would a module in this 256GB ECC RDIMM kit typically need replacement?

Replace a module only if the system logs uncorrectable ECC errors or memory diagnostics report a persistent fault on a specific 64GB stick.

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