I show you how I clean my computer out and prevent further dust buildup from occurring. The most common problem with computer cases is that the unconstrained output fans push out more air than the filtered input fans can provide, thus giving you negative pressure inside the case, this causes a few problems,: 1. Because negative air pressure sucks air in through any cracks or slits in your case, unfiltered air will enter your case, causing more dust to build up. 2. Because of the negative air pressure, the power supply fan will have a harder time pushing air through your power supply, therefore causing your power supply to heat up. The solution? Increase the amount of air entering your case, and only if you have to, decrease the amount exiting. Steps: 1. Test air pressure. 2. Check all fans to make sure they are working. 3. Decide whether to add more fans, or increase fan speed – if possible. 4. If necessary, slow down output fans. 5. Test air pressure again and repeat process if necessary. In my computer I now have 4 input fans (I added another since this video) all spinning slowly, and one output fan spinning on medium, I have found this to be all I need to keep my computer cool and silent.
Continued here:
Removing and Preventing Dust in your Computer Case