Currently I have an ATI 3450 video card. When I was running XP, the HDMI out passed both video and audio. When I upgrated to VISTA Home Premium, only video was passed. This is a know issue for VISTA versions of Catalyst and looks like it won't be fixed. Not too big of an issue since I have digital out from my sound card but I would like to pass the HDMI signal to my new amp and then to the TV. Any recommendations?