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Two green 288-pin DDR5 RDIMM modules, no heat spreader

NEMIX RAM

NEMIX RAM 32GB (2×16GB) DDR5 4800 CL40 ECC RDIMM 1.1V ASRock WRX90

SKU CH-PPWJ-QJR4E

32 GB dual-channel DDR5 ECC registered RDIMM kit running at 4800 MT/s CL40 and 1.1 V, validated for ASRock WRX90 workstation boards

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 32GB 2X16GB

Show 3 more
  • 32 GB kit expands workstation memory capacity with two 16 GB modules
  • DDR5 4800 speed delivers high bandwidth for demanding server workloads
  • ECC registered design protects data integrity in mission-critical environments
  • 1 V operation reduces power draw while maintaining stability
  • Validated for ASRock WRX90 WS EVO motherboard compatibility

ASRock WRX90 ECC RDIMM Kit

This 32 GB kit contains two 16 GB DDR5 4800 registered DIMMs built for the ASRock WRX90 WS EVO motherboard. ECC and registered buffering protect data integrity in server and workstation workloads. The modules run at 1.1 V with CL40 latency.

Thermals and Power Profile

Operating at the standard 1.1 V DDR5 voltage keeps power draw low for high-density registered memory. No heat spreaders are fitted, so airflow across the bare modules handles cooling in a chassis with adequate front-to-rear flow. Registered buffering adds minimal latency while stabilising the memory bus.

Build Integration

The 288-pin RDIMM form factor fits only DDR5 RDIMM slots; it will not work in consumer UDIMM or SO-DIMM sockets. Each module is single-rank 1Rx8, allowing full population of the WRX90’s eight channels without rank limits. Buyers needing non-ECC or unbuffered memory should look elsewhere.

How it compares

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

Price $877.99
Pricier than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $27.44 per GB
Pricier than about 76% 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 numberMR38400-618K2
Total capacity32 GB (2 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items32 GB (2 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 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 do I install the 288-pin DDR5 RDIMM modules on the ASRock WRX90 WS EVO motherboard, and what step is often missed?

Power off the system, open the chassis, align each module's notch with the slot key, press firmly until both retention clips click, then verify in BIOS that both 16GB modules are detected at 4800 MT/s; the step often missed is enabling ECC in the firmware after installation.

What maintenance or replacement will the 32GB ECC RDIMM kit need over its service life?

No routine maintenance is required; the modules have no heat spreader and run at 1.10V, so keep the server's airflow clean, and replace only if a module fails — ECC corrects single-bit errors on the fly.

What limit appears first when the 4800 CL40 RDIMM kit runs under sustained heavy workloads?

The CAS latency of CL40 and the 4800 MT/s data rate set the throughput ceiling; under continuous load the memory controller hits that latency-bound bandwidth limit before thermal throttling occurs at 1.10V.

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