I have a SAPPHIRE X850XT 256MB card and it is currently idling at 110 degrees or so according to the Everest Home Edition utility. It is installed in a Dell Dimension 8400 desktop pc and I just cleaned the case out of dust. It is also not sitting next to a wall or anything else. I check the fans and the two in the case are spinning and the fan on the video card is also working. I'm a little frustrated because it has worked fine in the past but now my system starts to beep if I play any graphic intensive games. The temperature has gotten as high as 145 degrees last night while trying to play. Any ideas? Thanks in advance for any help.