Hello, I recently purchased a Radeon X800 XT for my dual 2 GHz PowerMac. The new graphic card works beautifully until I try to wake my computer from sleep. The computer starts up for about 30 seconds and then goes back to sleep. It keeps doing this, and the only way I can get back to work is if I hold the power button down until the computer turns off and then restart. Any suggestions? Would a driver, or the reinstallation of the packaged ATI software help? Thanks in advance!