We've been speculating about this for MONTHS. We were all waiting for a decent way to use the freakin' GPU for accelerating HD videos. Come on, on Windows a sh*tty ION based 199$ nettop can do 1080p and bluray with no effort thanks to the power of the GPU and PureVideo. An ATI 4670 or 4850 would be OVERKILL if we were able to use ati UVD (the "PureVideo" of ATI cards). A 9400 would be good to. So, the question was: in the age of HD videos, why are Mac users condamned to rely only on the power of the CPU? Now Snow Leopard has been out for 2 months. We've put our geeky hands on QuicktimeX. So, what has changed? Hence the reason of this thread. I'd like to use it to gather all possible information about this topic. (myself, I cannot contribute a lot 'cause I don't have a Mac with nvidia 9400 and Snow Leopard) So the main questions: 1) Is it true that "Qtx HW h.264 acceleration" only works with a nVidia 9400? Really? So if you buy a pricey 4670/4850 Mac you won't get a feature supported by the MacMini? Will other cards be supported in the future? 2) Does "Qtx HW h.264 acceleration" only works with h.264 mp4 files? Does it also works with the more common and useful "x264 MKVs? (for ppl who ignore it: you can play MKVs in QuicktimeX after installing Perian and doing the "NicePlayer trick", i.e. installing NicePlayer and loading it once) 3) High-end iMacs now use powerful desktop CPUs...let's assume we cannot get GPU hw acceleration.....how will i5/i7 iMacs behave with high bitrate 1080p x264 MKVs? (answers after the shipping of quad core iMacs) 4) Now a "political" question: making it so "hard" (if possible) to use GPU HW acceleration with common mkv HD files, can be consider a way for Apple to encourage the use ($$$) of iTunes HD videos and not_caring/discouraging the use of other HD videos? This is a serious issue of Macs....I mean, even ati x1600 and nvidia 7600 on 2006 Macs could have supported GPU accelerated video playback....but not on OSX! And even nowadays, they allow ONLY one card (9400) and ONLY in QuicktimeX (they don't provide 3rd party developers with a tool to use acceleration on their non-QT based players, like XBMC-based players). Thank you for your attention.