There's a tiny either bug or something emachines/amd did on purpose(no one is for sure yet) with the 64 bit laptop. I found out on a forum that if you don't have it plugged into the wall, the processor runs at 800 mhz. But if you plug it into the wall(power outlet), it runs at the full 1.8 ghz. The workaround I saw for it was to change the power option to always on and it'll keep running at 1.8 regardless of plugged in or not (although battery life will take a larger hit
)
But I've been thinking about getting the 64bit emachines laptop, but I'm waiting until they roll out the 128 meg 9600 sometime shortly I read somewhere.