ATI actually said that you can do HDMI via DVI but mind me that would not be the full HDMI, as it would transfer video only.More details over here.
The HDMI interface has to conduct audio and video signals and therefore you should make a custom graphic card design with an audio connector on the card. It may sound silly but you actually do need this, otherwise you would be stuck with an HDMI graphic card that will transfer video only, not audio.
You also need one more chip - the famous SiI HDMI transmitter chip, which is actually an HDCP content protection chip, to call your computer HDMI compliant.
ATI Radeon X1900 XTX with HDMI is possible
Posted on Wednesday, Apr 12 2006 @ 00:06 CEST by Thomas De Maesschalck