ATI Radeon HD4850 512MB GDDR3 with
you have to go into control panel hardware and sound, now click on sound, you will see speakers with a green check next to it. on top you will see HDMI enable those and hit test button. this is part of device no worry bout bios or motherboard. Just make sure you use the adapter that came with the video card it will only work with the supplied adapter. Not a dvi to hdmi cable. this will work. i hope this helps and good luck. I can coach you more but i am not sure of your operating system. i was coaching you using vista.