Desktop GPU Cooling System: fan control circuit fault. The motherboard cannot command or sense fan speed correctly.

The distinguishing clue

The fan runs at full speed constantly or reports an error despite spinning.

Checks before an assessment

Record whether visual artefacts, fan noise and loss of video occur together. Stop graphics load when there is excessive heat, a burning smell or a stopped fan.

Stop point: Stop graphics-load testing if artefacts combine with excessive heat or burning smell.

Workshop confirmation and repair

Device-level check: Log graphics temperature, hotspot, clocks and fan speed while checking case airflow and card condition.

Targeted check: Compare temperature, command and tachometer behaviour. If confirmed: Repair the controller or sensing path after testing a known fan.

Repair boundary: Repair the fan, heatsink, pad, compound or controller fault confirmed on the graphics card.

Related cause to rule out

When fan speed rises but exhaust airflow remains weak, also consider Desktop GPU Cooling System: dust blockage before choosing a repair.

Checks after the work

After repair or replacement, check video output, graphics load, fan response, hotspot and cooldown.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.