Someone had his Biostar nForce 3 chipset socket 754 mb up to 2.7(330 X8 multiplier) using a Sempron 2600 and claims it to be faster than a fx-55 which I find hard to believe. That is over a 1.0gig overclock and stock is 200 X8 multiplier = 1.6ghz. He only had to raise the voltage by one tenth of a volt for this overclock using the stock heatsink and fan.
Believe it?