You have several choices:
1.) Easiest way to overclock is with a program that modifies BIOS values in Windows, such as SoftFSB or CPU Cool. I have both of these at <A HREF="http://www.crashman.dns2go.com" target="_new">http://www.crashman.dns2go.com</A>. You'll have to figure out which clock generator you have by looking at the model number of the chip itself, which is on the board.
2.) The second easiest way is to use an "Overclockers BIOS". The original "testers" BIOS for the K7S5A had bus speed adjustment, I believe later versions of the "testers BIOS" are actually modified factory releases with part of the code from the original. You would have to find these on the internet by using a search engine.
3.) You can modify the multiplier on the chip itself, this is very difficult to do. You need to find the necessary brige information on a site like THG and join/cut the necessary bridges to make the new multiplier. I think the bridge involved might be L7.
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