I think, if i can add my piece of the pie, that this is what the guys here mean:::
The setting on your motherboard that you see, that is currently 100, is the speed of your Front Side Bus (FSB). As was said, your processor itself will be set to run at a speed of 20 times the FSB, ie at the moment it runs at 2000 Mhz (which is 2 Gigahertz). What many people do, including myself, is to give yourself some 'free performance upgrade' by increasing the FSB, and thereby increasing the overall speed of the processor automatically.
You would be wise to do this a bit at a time though, increasing by say 5 or 10 Mhz FSB at a time, and then running some programs in windows to check that everything is ok.
The other thing that you need to do - as you increase your FSB, you may get instability just because the processor isnt getting enough voltage (i think they are normally set to 1.5V ?? I am NOT an electrical expert here though!).
As for me - i run my Pentium 4 1.6A (normally 100 FSB times 16 multiplier locked) at 135 Mhz FSB, giving me 2.15 Ghz and after telling my BIOS to increase voltage to 1.6V everything is wonderfully stable in my MSI 645 Ultra motherboard! Woo hoo!!
Have fun, but please dont blow up your shiny new equipment!
Don't believe in skepticism.<P ID="edit"><FONT SIZE=-1><EM>Edited by nursemsic on 04/18/02 03:10 AM.</EM></FONT></P>