Make sure your efficiency doesn't turn into a compromise ...

Stress testing your CPU is a great way to ensure that your overclock is stable, check that your cooling is powerful enough, or run in some new heat paste that you've applied to your processor. But ...

A lot of people use Prime95 to test their cpu overclock...a google search will probably bring up a place to download it from.

A looping timedemo of Quake 3 is a good stability test. I find that it is a better vid. card stability test than, say, a looping 3Dmark 2k benchmark. For some reason, if I clock my GF2Ultra too high, ...