you have to connect the L1 Bridges on the CPU, I would suggest taking the CPU completely out of your computer and cleaning off any thermal paste thats on it. Now when you look at the CPU you should see a bunch of gold dots around the sides and there should be a set a 4 ( 8 individual 'dots') that have the label "L1" in front of them. If you look closely you should see that these have been cut by a laser. You need to connect them, it should be like this:
L1 : : : :
and you want it to look like this
L1 | | | |
most people use a pencil, conductive pen or rear window defrost repair kits. I used the rear window defrost repair kit and it worked flawlessly and is easy to clean if you need to redo it, etc. The conductive pens (from what I've seen) are more difficult to use and the pencil sometimes doesn't work very well.
If you want more info go to places like
http://www.tomshardware.com (I think)
and look around for stuff on overclocking Athlons/T-Birds.