I was wondering if i connected my computer (ATI Radeon 9800) and my tv with a dvi to rgb adapter i would get an actual 1920x1080 resolution on the tv or would it be like 640x480 or 800x600. I know my TV supports 1080i and 720p. There is no dvi input on the tv, so i know i need an adapter, which kind should i get? I found this DVI400 Super-High Performance DVI-D Video Cable for HDTV - 6.56 ft , is this what I need? Thanks in advance.