Any bootable CD stress tests?

[EsaT]

Are there any good PC stress tests (CPU,MB) programs which can be run from bootable CD-ROM?
Unstable overclocking could well corrupt XP and I've done enough of installing/playing with installation of XP for couple months while fixing one Fujitsu-Siemens PC so I don't want to start doing extra fresh installs when I have Conroe rig assembled in weekend and I'll start doing some overclocking tests.
I'm not expecting those to be 100% accurate tests for real stability but at least those could give somekind info about stability at different speeds.

[davexl]

yes heaps - google Ultimate Boot CD

I tend to just use a Memtest bootable CD http://www.memtest86.com/

[davexl]

also try this for starters - cut down windows version:

http://www.xtremesystems.org/forums/showthread.php?t=113526