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Single green DDR5 UDIMM module, 48 GB, no heat spreader, 288 pins

NEMIX RAM

NEMIX RAM 48GB DDR5 4800 CL40 1.1V 2Rx8 UDIMM memory upgrade

SKU CH-X89H-NYYRN

A 48GB DDR5 4800 CL40 UDIMM module built for ASRock Z790 Lightning WiFi motherboards

  • Total capacity48 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 48 GB capacity expands desktop multitasking headroom
  • DDR5 4800 speed delivers high bandwidth for demanding workloads
  • 1 V operation reduces power draw and heat
  • CL40 latency supports responsive system performance
  • 288-pin UDIMM fits compatible ASRock Z790 motherboards

Capacity and motherboard match

This 48GB DDR5 module is built for desktop PCs using the ASRock Z790 Lightning WiFi motherboard. It fits a single 288-pin UDIMM slot and delivers 48GB of memory in one stick. The kit suits users who need a straightforward capacity increase on that specific platform.

Sustained-load behaviour

Modules are stress tested under load to verify stability during extended workloads. The 1.1V operating voltage and CL40 timing remain consistent throughout long sessions. Unbuffered, non-ECC operation keeps latency predictable for desktop applications.

Pre-installation checks

Verify that your motherboard is the ASRock Z790 Lightning WiFi model before ordering. Confirm the board has a free 288-pin DDR5 UDIMM slot and that the BIOS supports 48GB single-rank modules. The memory runs at 4800MT/s with no heat spreader installed.

How it compares

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

Price $604.99
Pricier than about 54% of the 21,161 comparable items (median $397.99).
Total capacity 48 GB
Higher than about 55% of the 20,941 comparable items (median 32 GB).
Price per GB $12.60 per GB
Pricier than about 58% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASRock Gaming Motherboard Compatible Series Memory
Model nameASRock DDR5 4800 MHz Non-ECC Unbuffered UDIMM
Part numberMD38400-4828K1
Total capacity48 GB
Product type288-Pin DDR5 UDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items48 GB (1 × 48 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM

Questions about this item

How much heat does the 48 GB DDR5 4800 CL40 module produce when running all day?

This module runs at 1.1 V and has no heat spreader, so it relies on case airflow to stay cool under continuous load.

What motherboard slot and voltage must my board provide for this 288-pin DDR5 UDIMM?

The board needs a DDR5 288-pin UDIMM slot that supplies 1.10 V at 4800 MT/s.

Will this 48 GB DDR5 4800 CL40 module work alongside my existing DDR5 4800 CL40 sticks on a Z790 board?

Mixing modules with identical speed and latency usually works, but stability depends on the motherboard's memory controller and BIOS.

More in Model-Specific Memory Upgrades

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