I am running an Athlon 500 OC FSB to 110 (550), stable, Asus K7M, W2000Pro, 256MgRam. I believe to realize the full potential I (and your friend) need to use an add on multiplier card (such as Goldfinger, etc..) prices I have seen range from about 39$ to 79$, and of course you will need to open the case of the processor to install. From the postings I have seen, this device usually allows you to OC to about 700 Mhz (from a 500) with good results. It depends on your chip and it's quality, of course.