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Four green circuit boards with black memory chips and gold edge connectors lying flat

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 5600MHz CL46 1.1V 2Rx8 288-Pin UDIMM for ASRock Rack W680D4U-2L2T/G5

SKU CH-55ZX-2GYRH

A 128 GB kit of four 32 GB DDR5 modules running at 5600 MHz with CL46 latency and 1.1 V operation, built for the ASRock Rack W680D4U-2L2T/G5 motherboard

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 128GB total capacity across four 32GB modules
  • DDR5 5600MHz speed rated at PC5-44800
  • Low 1.1V operating voltage reduces power draw
  • CL46 CAS latency for responsive operation
  • 288-pin UDIMM form factor fits compatible desktop boards

128GB DDR5 Kit for ASRock Rack W680D4U

This 128GB kit contains four 32GB DDR5 5600MHz modules built for the ASRock Rack W680D4U-2L2T/G5 motherboard. It targets administrators and integrators who need maximum supported capacity on that platform. The unbuffered non-ECC design matches the board's desktop-class memory slots.

Sustained Load Behaviour at CL46 1.10V

Running at the rated 5600MHz with CL46 latency and 1.10V, the 2Rx8 organisation keeps bandwidth stable during long compile jobs or virtualisation workloads. Without a heat spreader the modules rely on chassis airflow, so sustained throughput depends on case cooling rather than on-board thermal mass.

Pre-Install Checks for 288-Pin UDIMM Slots

Verify the motherboard is the exact W680D4U-2L2T/G5 model and that all four 288-pin DDR5 slots are free. Confirm the BIOS is recent enough to initialise 128GB of non-ECC UDIMM memory at 5600MHz. Ensure your chassis provides adequate airflow over bare modules since no spreaders are fitted.

How it compares

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

Price $1,933.99
Pricier than about 68% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $15.11 per GB
Pricier than about 61% 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 lineNEMIX RAM Original Series Memory
Model nameDDR5 Non-ECC Unbuffered UDIMM Memory
Part numberMD44800-328K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 UDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items128 GB (4 × 32 GB) DDR5 5600 MHz PC5-44800 2Rx8 1.1 V 288-PIN Non-ECC UDIMM KIT

Questions about this item

Does the 1.1V operating voltage keep the 128GB kit cool during continuous operation?

The modules run at the standard DDR5 voltage of 1.10V and have no heat spreader, so they rely on case airflow to stay cool under sustained load.

Must the ASRock Rack W680D4U-2L2T/G5 motherboard already be installed for this memory to work?

Yes, this 288-pin UDIMM kit is validated for that specific board and will not function without a compatible DDR5 platform.

Can I add this 2Rx8 CL46 kit to a system that already has slower DDR5 modules installed?

All four 32GB sticks share the same 5600MHz speed and CL46 timing; mixing with slower DDR5 will force the system to run at the lower speed and looser latency.

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