well i think the new drivers are working fine, showing 75°c as the actual temp...if you want to know for sure get a temp probe and stick it on the back of the card in the center of the gpu area and see what the temps are, or you could always feel the heatsink with your finger to see if it's hotter with one driver... i've never heard of a new driver making a card run hotter... and yeah 75°c is pretty dang hot, dell cases generally have pretty poor airflow for the video card...shop around for a vga silencer, i got one for my 9800 pro and love it...overclocking is only limited by the voltage now since it keeps the temps plenty low.