On an EVGA GTX460 that I just installed, it has a connector for a SPDIF cable between the sound and video cards. Since my monitor doesn't have speakers, I still have sound routed to my 5.1 speaker system, and video via DVI. I have no idea if the video would be better on HDMI, but it is the same as before I bought this video card. If the video were connected to a bigger screen than I have (23"), HDMI might be needed for a greater resolution than is available on DVI...I don't know. Yes, the video driver
does install 3 HD Audio components, but obviously, I'm not using them.