I recently purchased a HDMI cable to run from my XFX Radeon 6870 to my TV, to allow me to use it as a second monitor. At first I had some black screen issues, but now I can actually use it as a monitor.
The problem is, that the resolution/image quality on the TV (second monitor) is horrific.
I don't think it's an issue with the 6870 - I took a screenshot of my desktop and the image quality looked fine. It's just the visual on the TV itself which is displaying a poor quality image. I've tried multiple resolutions, refresh rates, all to no avail.
The TV is a Samsung LE19R86BDX/XEU, and I'm using the HDMI/DVI In port.
Any resolution suffers from the low quality issue.
Using the "Recommended" resolution of 1440x900 results in a "Mode Not Supported" screen on the TV.
I'll include a screenshot so you can see that the image quality is great in theory, however on the actual TV it's grainy, low quality, and the colours are distorted. http://oi49.tinypic.com/9pnh40.jpg
at 1440x900 you should just use a vga cable and skip the tv trying to format your hdmi input (ie - it thinks its going to be getting 720 or 1080 and trying to fit it onto its small screen) Well thats my theory and i'm sticking to it. LoL
Ahhh crap - i just realized your 6870 wont have a vga on it... hopefully one of your dvi's will be analog capable.
unfortunately your tv is a 16:10 where as hdtv is 16:9
try running in 1152x720 or 1728x1080 if regular 720 & 1080 dont work well.
I'm using a DVI-VGA adapter for my first monitor, doesn't work on the second DVI port like you said. So I really need to get this HDMI input working, or I'm going to have to buy a brand new monitor/TV.
Also, I use the TV with my xbox via component. So, I'd need a TV or Monitor that can allow both DVI and Component to be used with it, preferably by just switching modes so I don't have to unplug things to switch.