If you have a small power supply (200W to 300W) It may be working too hard to supply al the power your computer needs. Upgrading to a 450W lets the suply work less, creating less heat.
**Practicing the dark art of turn signal usage since 1976.**
No i don't know how much installation will be. If you can remove the side panel you should be able to replace the power supply. Take your time and make note of where everything is plugged in.
**Practicing the dark art of turn signal usage since 1976.**