So I am having a problem connecting my computer (eg. xfs 8800gt) to my tv (eg. Sony 52" BRAVIA 1080p HDTV) so whenever i connect the computer through vga table to the tv (vga port), it works on full resolution. However, if I connect the tv through a cable to is one end dvi and the other HDMI (to hdmi port), it doesnt give me the same resolution.
hdcp can be a pain...i agree with boxzor and hixbot. Its your most likely culprit. Possible its a driver issue (had similar experience with 3870x2 running on the exact same model TV which you speak) though i was able to get it working after about twenty minutes of tinkering. (ie flashing bioses, updating drivers...etc)
an 8800gt should be hdcp complient (question is which version and what version does your TV run). If your TV has a newer spec, your basically screwed tell u upgrade.
personally i don't recall ever seeing an 8800gt listed specs that wasn't HDCP complient....could be a possiblity all the same though considering how many of those cards flew off the shelves during it's release leaving many people in wait for new stocks. Well that or what i mentioned above are the only likely culprits that come to mind. best of luck to you killersfan.