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Green circuit board with black memory chips no heat spreader 288 gold pins

NEMIX RAM

NEMIX RAM 16GB DDR5 4800 CL40 1.1V 288-Pin UDIMM for ASRock Z790 Lightning WiFi

SKU CH-SFRB-AMZA4

16GB DDR5 4800 CL40 desktop memory module validated for ASRock Z790 Lightning WiFi

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 16 GB DDR5 4800 for high-speed desktop performance
  • CL40 latency at 1.1 V for efficient operation
  • 288-pin UDIMM fits ASRock Z790 Lightning WiFi
  • 1Rx8 Samsung Micron Hynix chips ensure reliability
  • Non-ECC unbuffered design for standard desktop builds

ASRock Z790 Lightning WiFi DDR5 module

This 16 GB DDR5 UDIMM is validated for the ASRock Z790 Lightning WiFi motherboard. It targets builders upgrading that specific board with a single, non-ECC stick. The unbuffered design keeps installation straightforward for desktop users.

Thermals and power at stock settings

Operating at 1.10 V the module runs within standard DDR5 voltage limits. No heat spreader is fitted, so airflow across the PCB handles cooling. Power draw stays low at the rated 4800 MT/s speed.

Capacity and speed decide fit

The 16 GB capacity at DDR5 4800 with CL40 latency determines whether this matches the required memory configuration. Builders needing a different density or timing should verify their board's qualified vendor list.

How it compares

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

Price $187.99
Cheaper than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $11.75 per GB
Pricier than about 57% 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 numberMD38400-618K1
Total capacity16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items16 GB (1 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM

Questions about this item

How do I install the 288-pin DDR5 UDIMM on the ASRock Z790 Lightning WiFi and what step is often missed?

Align the notch on the module with the slot key, press firmly until both retention clips click, then verify in BIOS that the memory runs at 4800 MT/s and 1.10 V; the step often missed is enabling the XMP or EXPO profile to reach the rated speed.

What maintenance or replacement will the 1Rx8 16 GB module need over time?

No scheduled maintenance is required; keep the motherboard firmware updated for stability, and replace the module only if memory diagnostics report errors or if capacity needs exceed 16 GB.

What limit appears first during sustained workloads on this CL40 1.1 V kit?

The primary limit is the fixed CAS latency of 40 cycles at 4800 MT/s, which caps throughput before thermal throttling becomes a factor on this unbuffered, non-ECC UDIMM.

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