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 288-pin DDR4 LRDIMM modules, bare chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR4 2666 ECC LRDIMM CL19 288-pin memory upgrade

SKU CH-MNHK-63QN7

256 GB DDR4 server kit with four 64 GB ECC LRDIMM modules at 2666 MHz CL19 1.20 V for ASRock EPYCD8-2T

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V

Capacity 256GB 4X64GB

  • 256GB total capacity supports heavy server workloads
  • Four 64GB modules fill four slots efficiently
  • DDR4 2666 speed delivers PC4-21300 bandwidth
  • ECC LRDIMM with 4Rx4 rank ensures data integrity
  • 20V operation at CL19 latency reduces power draw

Server-grade capacity

This 256GB kit delivers four 64GB DDR4 2666 LRDIMM modules for the ASRock Rack EPYCD8-2T motherboard. ECC protection and load-reduced architecture keep data integrity intact under sustained enterprise workloads. IT professionals choose it for virtualisation hosts, database nodes and high-density compute clusters where maximum DIMM slots are populated.

Headroom and limits

Four ranks per module at CL19 latency and 1.2V provide the bandwidth the platform specifies without exceeding the board's qualified speed. The 256GB total fills every slot, so no further expansion is possible on this motherboard. Workloads that demand more memory per channel or higher frequency will hit the platform ceiling.

Upgrade path

The kit replaces lower-capacity registered or unbuffered DDR4 DIMMs that cannot address this density. The jump is worth it when applications exhaust the previous memory ceiling and the motherboard firmware supports 4Rx4 LRDIMM topology. Buyers who need more than four modules or a faster data rate must change platform.

How it compares

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

Price $886.99
Pricier than about 60% 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 $3.46 per GB
Cheaper than about 87% 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 DDR4 2666 MHz ECC LRDIMM Load Reduced Server Memory
Part numberML21300-944K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items256 GB (4 × 64 GB) DDR4 2666 MHz PC4-21300 4Rx4 1.2 V CL19 288-PIN ECC LRDIMM Load Reduced Server Memory KIT

Other versions of this model

5 more in the same range

Questions about this item

Will the four 64GB LRDIMMs run together with any existing DDR4 2666 registered modules I keep in the ASRock EPYCD8-2T?

The kit uses 4Rx4 Load Reduced DDR4 2666 at 1.2V CL19; mixing with standard registered DIMMs is not supported on this platform, so populate all channels with the matched LRDIMM kit.

How can I verify the 256GB kit is detected at 2666 MT/s with ECC active after installation?

Enter the BIOS or run a tool such as dmidecode; you should see four 64GB LRDIMMs at PC4-21300, CL19, 1.2V with ECC enabled.

What exactly ships in the box and do I need any extra brackets or cables?

The package contains four 64GB 288-pin DDR4 ECC LRDIMM modules only; no brackets, cables or additional hardware are included or required.

More in Model-Specific Memory Upgrades

Similar items