Ok, another idiotically obvious question but I need to know if I'm right. Is it just me, or does it seem to be that the Sapphire version of the 9800np has a slower gpu and mem clock than, say, a hercules or ati build one. If so, how easily can this be overcome? If it can be overcome, what a nice OC i can run it at by changing the heatsink, and which heatsink would be best replace the original with?