Hi, I have an ATI HD4870 and I am using a DVI to HDMI cable to output video and audio to my LCD TV at 1080p 60Hz. Someone recently told me that DVI to HDMI is limited to 720p, that even if the settings are for 1080p the quality is only 720p, is there any truth in this?
4870 can do 1080P w/ audio @ HDMI. For it to work you should use ATI provided DVI-HDMI converter/adapter. Other adapter won't work.
Call the GPU manufacturer(i.e. diamondmm, xfx, asus) and it will mail you the ATI DVI-HDMI converter.
I tried this on 3800, 4800... and I have 3 4890s all w/ HDMI 1080P with audio working.