I just purchased the 6600 gt with dual dvi a few days ago to replace my 9800 pro a-i-w. 6600 gt is a better gaming card and I figured I could hook one dvi into my sammy hln series dlp and the other into my monitor, so watch movies or play games on tv and still use comp. I am using the the new 66.93 drivers, I think they are the only ones with support for 6600 gt.
The card recognizes the tv as a samsung dlp and even knows to set the resolution to 1280x720 at 60 Hz, which was pretty cool. I get 1:1 pixel mapping but with overscan, TV(Wide) mode. When I set the res to 1248x702 the tv just stretches the image. I know many people with sammy dlp's have had the problem where they can't get "normal" aspect ratio for dvi unless they use custom timings. I don't know why that happens, but that was the only way I could get 1:1 pixel mapping with my ati card. However the nvidia doesn't allow me to use custom timings for the sammy.
The only way I was able to achieve 1:1 pixel mapping with no overscan is when I set custom timings at the res 1248x702 for my comp monitor(primary display) and set the comp monitor to those specs. Somehow the tv (secondary display) accepted those settings and it looked great and overscan was gone.
However there were 2 problems with this
1. It required me to keep my 4:3 computer monitor at 1248x702 60Hz which looks terrible.
2. If I try to start a game (Half Life 2) it opens on the primary display. And if I if I make the sammy the primary display the overscan comes back.
If anyone has had any success with a similar setup or has any ideas please let me know. I might just return the card and go back to ati if I can't get rid of the overscan.
If anyone takes the time to read this long winded incoherent message, thanks for your time.