All-in-One PCs run hot because a full desktop's worth of components sits in a slim case behind the screen. Overheating throttles performance and shortens the machine's life — here's how to fix it.
Why AIOs Run Hot- Compact, sealed chassis with limited airflow behind the panel.
- Dust builds up in the small fan and vents faster than in a tower PC.
- Dried thermal paste after a few years of use.
- Placement against a wall or in a warm corner blocking the vents.
- Loud or constant fan noise; the back of the unit feels very hot.
- Slowdowns, stutters, or random shutdowns under load.
- The screen dims or the system throttles during heavier tasks.
- A professional internal clean of the fan, heatsink and vents.
- Fresh premium thermal paste on the CPU (and GPU if present).
- Replacing a worn/rattling fan; improving placement for airflow.
Because the panel must come off to reach the cooling system, this is best done by a technician who can open the AIO safely. A clean + repaste typically drops temperatures 10–20°C and restores quiet, stable performance.
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