I've heard that many athlon 500's actually have a 650 core!!!!
And if not, it still should be able to get you to at least 700-750!!!
There are programs with which you will be able to set your cpu's L2 cache to 1/3 instead of 1/3, which then gives you some more space to o/c!!!!
You probably already know it, but have a look at the cpu database at www.overclockers.com
Much info on how far people have gone with their chips!!!
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