I have overclocked my machines for years ... Go with Noccys advice .. you dont say what CPU, Mobo, Memory you have .. some makes/models just dont Overclock at all..
Once you tweak anything test that setting for stability .. you may think your oc lifting FSB 10 % is great but then in the midst of a game .."bang...reset ..."
Testing .. Use Prime95
http://files.extremeoverclocking.com/file.php?f=103
Also SP2004
http://sp2004.fre3.com/
If it looks like you have a stable system setting.. test that setting for a minimum of 60 mins.. Consider overnight
If you want to get serious .. consider some of the special BIOS's they can add stability at higher FSBs
Once you tweak anything test that setting for stability .. you may think your oc lifting FSB 10 % is great but then in the midst of a game .."bang...reset ..."
Testing .. Use Prime95
http://files.extremeoverclocking.com/file.php?f=103
Also SP2004
http://sp2004.fre3.com/
If it looks like you have a stable system setting.. test that setting for a minimum of 60 mins.. Consider overnight
If you want to get serious .. consider some of the special BIOS's they can add stability at higher FSBs