I have this board with XP 1600+. I put it into Silent PC case which is a terrible case when it comes to cooling your system. Using Zalman Flower heatsink my CPU temperatures were around 67 under load. Once, out of curiosity I raised the FSB to 150. What a disaster, I even had problems getting into BIOS to turn the FSB back to 133. I just ordered Swiftech 462, 120mm case fan for intake, 80mm for outtake and a 350W Enermax PS (the one that came with Silent PC case - Q Technology 300W - died on me!!!!). Now I plan on redoing my whole setup. I was wandering what kind of temperatures you guys get and what are your overclocking experiences using this Gigabyte board??