Symptoms
- GPU temperature readings above roughly 85–90C under load
- Games or apps stutter, crash, or the driver reports a crash (TDR error)
- Fans run very loud trying to keep up with heat
- Case feels warm to the touch near the GPU area
Likely causes
- CommonDust buildup on the GPU's heatsink and fansDust insulates the heatsink and blocks airflow over time.
- CommonPoor case airflow trapping heat around the cardNot enough intake or exhaust fans lets hot air build up inside the case.
- PossibleDried-out or degraded thermal paste under the GPU coolerPaste breaks down over several years, especially under heavy use.
- PossibleGPU pushed by an aggressive factory or manual overclockHigher clocks and voltage generate meaningfully more heat.
- PossibleCard mounted in a cramped case with poor clearanceInsufficient space around the card restricts its own fans from working effectively.
What to do
- Clean the GPU's fans and heatsink fins with compressed air, holding fans still while blowing to avoid spinning them too fast.
- Check overall case airflow, adding or repositioning case fans to create a clear intake-to-exhaust path.
- Use GPU monitoring software to check actual temperatures under a sustained load test.
- If temperatures are still high after cleaning, consider reapplying thermal paste (advanced, and may void warranty on some cards).
- Reset any manual overclock to default settings and see if temperatures improve.
- Ensure the case has adequate clearance and isn't blocking the card's fans against a wall or drive cage.
Tools and parts
- Compressed air
- GPU monitoring software
- Thermal paste (if repasting)
Thermal pasteSearch: “GPU thermal paste”
When to call a pro
If cleaning and better airflow don't bring temperatures down and repasting feels beyond your comfort level, a PC repair shop can service the cooler safely.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.