Actually I did that mod the day I got the board, before I even got any of my other components. But I didn't get around to strapping a fan onto the pwm or nb heatsink I was hoping I could keep it passive. Tonight I'm gonna have to strap an 80mm fan onto the pwm while I load it to see if its prime stable. I can get the pwm to mid 70C loaded using a fan (according to uguru) would that be a decent temp for the pwm? And which temp in uguru is the NB temp, is it system? Thanks in advance