No config really. Plugged the card in. Installed the latest AMD Catalyst driver for Win7 32bit including sound part. Set screen output to 1280x720 @60Hz (HD Ready plasma screen). Set sound to 5.1 on Windows speaker output. That's it. The receiver extracts the sound via HDMI and the picture gets sent on to the TV. I also tried it on a 24" LCD PC monitor with speakers and Full HD picture and stereo sound worked fine over HDMI.Do you mind sending me your config(s) I cannot get my 5450 to work)