I'm wondering at what resolution (If at all) the iMac will output to my HD TV. (connecting from the mini DVI port of the iMac to the HDMI port of my TV.) What we know: Ati Radeon X1600 supports external display in extended desktop and video mirroring modes. Digital resolutions up to 1920 x 1200 and analog resolutions up to 2045 x 1536. DVI can support HDCP which is the copyright protection... Not sure if new Macs have this built in... – asitcher The Microsoft WMV-HD page recommends 256MB of video RAM for smooth 1080p – martinAyla The X1600 (according to the ATI website) supports both HDCP (as questioned earlier) over the DVI output and it supports >hardware decoding< of MPEG-2, MPEG-4, DivX, WMV9 and VC-1 - H.264!! – martinAyla PS. The X1600 only supports hardware decoding at 720p max resolution but I think this is a software issue (hopefully that will change, X1800 supports 1080p). – martinAyla I'd like to hear about 1st hand experiences. Anybody knows how the intel iMac will handle HD 1080p movie previews? My dual 1.8 GHZ G5 is doing OK, but not great.