The WHQL signature costs quite a bit of money. I'm not exactly sure, but I have heard stories of companies paying Microsoft upwards of $10 000 to have a driver WHQL certified. With most games, a card will run at about 60-70 degrees Celcius. However, running a game like Crysis, with high detail, the temp on my GPU reaches high 70's-low 80's. I'm fortunate that I don't depend on the drivers to control fan speed. I have a Zalman cooling fan that has adjustable speed (a small dial on the control box) and is connected directly into the PSU wiring. Not the card itself.