[NullAshton]

If you do overclocking right, you can get about a 15% increase in performace, at no risk to the component you're overclocking. Graphics cards are probally the easiest to overclock, since they're more resistant to heat. Simply increase the clock settings bit by bit, playtesting it for 5 minutes every time you adjust it, until you notice graphical artifacts. Then adjust the settings back a little, and do an extended playtest. If a graphics card overheats, you'll know it, because of those graphical artifacts.