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
Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM MR38400-618K4 64GB (4x16GB) DDR5 4800 ECC RDIMM

SKU CH-XKYH-RA8CS

A 64 GB quad-channel DDR5 ECC RDIMM kit running at 4800 MT/s with CL40 latency and 1.1 V operation

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 64GB 4X16GB

Show 3 more
  • 64 GB total capacity for memory-intensive server workloads
  • DDR5 4800 speed delivers high bandwidth for data-heavy tasks
  • ECC registered design detects and corrects errors for reliability
  • 1 V operation reduces power draw in dense configurations
  • Validated for ASRock WRX90 WS EVO motherboard compatibility

Targeted Server Memory Kit

This NEMIX RAM kit provides 64GB of DDR5 memory in a matched set of four 16GB modules. It is built for ASRock WRX90 WS EVO motherboards that require registered ECC DIMMs. System integrators and IT professionals handling mission-critical workloads will find the specification aligned with enterprise stability requirements. The registered design and error-correcting code suit multi-socket server boards rather than consumer desktops.

Build Integration Requirements

Each module uses a 288-pin DDR5 RDIMM form factor and operates at 1.10V with a CL40 latency. The registered buffer reduces electrical load on the memory controller, freeing the platform to populate all slots without signal degradation. Installation follows standard server DIMM procedures; the kit assumes the motherboard firmware supports the stated speed and rank configuration. Buyers needing unbuffered or non-ECC memory for consumer platforms cannot use this product.

Sustained Load Behaviour

Modules are stress-tested under load before shipping to verify reliability during continuous operation. The 1Rx8 organisation and Samsung, Micron or Hynix chipsets deliver consistent throughput at the rated 4800MT/s data rate. Error-correcting code detects and corrects single-bit errors in real time, preserving data integrity during long compute runs. Systems without registered ECC support will not benefit from these protection mechanisms.

How it compares

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

Price $1,806.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $28.23 per GB
Pricier than about 79% 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 lineASRock Server Motherboard Compatible Series Memory
Model nameASRock DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-618K4
Total capacity64 GB (4 × 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 items64 GB (4 × 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

5 more in the same range

Questions about this item

Does the CL40 latency become the bottleneck during sustained server workloads?

CL40 is the rated CAS latency for this DDR5-4800 kit; under continuous load the latency figure itself does not change, so the limit you hit first will be the 4800 MT/s transfer rate rather than the timing.

How much heat and power does the 1.10 V registered kit produce when running all day?

Each 16 GB module operates at 1.10 V without a heat spreader; registered DDR5 at this voltage typically draws only a few watts per DIMM and runs cool enough for standard server airflow.

What motherboard features must already be present for this 288-pin RDIMM kit to work?

The board needs DDR5 RDIMM slots, registered ECC support, and validation for 4800 MT/s operation — the ASRock WRX90 WS EVO is the platform this kit is built for.

More in Model-Specific Memory Upgrades

Similar items