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 sticks without heat spreaders, 64GB total

NEMIX RAM

NEMIX RAM 64GB 4x16GB DDR5 4800 CL40 ECC RDIMM ASRock TRX50 WS

SKU CH-C747-YBCZN

64 GB kit of four 16 GB DDR5 4800 CL40 ECC registered DIMMs at 1.1 V for ASRock TRX50 WS workstations

  • 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

  • 64 GB total capacity with four 16 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM for server-grade data integrity
  • CL40 CAS latency at 1.1 V operating voltage
  • 288-pin DDR5 RDIMM validated for ASRock TRX50 WS

Capacity and Target Use

This kit provides 64GB of DDR5 ECC registered memory in four 16GB modules. It is built for the ASRock TRX50 WS workstation motherboard where registered DIMMs are required. Systems that need unbuffered memory or non-ECC modules cannot use this kit.

Decisive Specification

The modules run at DDR5 4800 with CL40 latency at 1.1V and use a 1Rx8 organisation. Registered ECC operation is the single trait that determines compatibility; the motherboard must support registered DIMMs for this kit to function.

Installation Notes

The 288-pin RDIMMs install like standard DIMMs but the motherboard manual must be followed for population order and BIOS settings. A common issue is leaving registered ECC disabled in firmware, which prevents the system from posting.

How it compares

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

Price $1,630.99
Pricier than about 65% 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 $25.48 per GB
Pricier than about 70% 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

What does the 4800 MT/s rating mean for real-world throughput on the ASRock TRX50 WS?

The kit runs at DDR5 4800, which equals PC5 38400 bandwidth. With four 16 GB modules populating all channels, the platform can sustain that peak transfer rate across workloads that keep the memory bus saturated.

How does the registered ECC design affect compatibility with the TRX50 WS memory controller?

Each module is a 288-pin DDR5 RDIMM with on-die ECC and a register buffer. The TRX50 WS chipset requires registered ECC DIMMs, so this kit matches the electrical and protocol expectations of the motherboard's memory controller.

What physical clearance do the bare 1Rx8 modules need inside a workstation chassis?

The sticks are standard-height 288-pin DDR5 RDIMMs without heat spreaders. They occupy four adjacent DIMM slots and only require the usual vertical clearance for the latch mechanism and any CPU cooler overhang.

More in Model-Specific Memory Upgrades

Similar items