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Message: <blockquote data-quote="JimmyBoy" data-source="post: 795229" data-attributes="member: 72806">Just to give you some encouragement, I have a GTX 460 connected to a LG60PK250 60" Plasma via HDMI and it works flawlessly out of the box!, so you should be able to do the same also.As above, the first thing to check is does it work via the nVidia Control Panel?The way I done this is like so. I find an example video and found out its refresh rate. Say for example the refresh rate of the Video is 25fps then I would go into nVidia Control Panel and set the Refresh rate to say 60Hz. I would then Open & Play the video - the video SHOULD be a  little jerky as their is a refresh rate mismatch between the video and display. Now close the video, go back to the control panel, and set it to 50 or 25Hz. Then open the video again and you should hopefully see silky smooth playback. If so, everything is in good working order in terms of the connection between nVidia and your TV regarding refresh rate changing. If this doesnt work at this stage then there is some other annomally and is outside of MediaPortal's control, so you would need to find the problem, before you moved on to trying to get it to work in MediaPortal.I set mine up some time ago now, but from memory, I just clicked on the checkbox to activate Automatic Refresh rate changer and didnt change anything else (ie. I left NTSC, PAL, CINEMA settings untouched)When you are in MediaPortal and play a video, remember you can press Shift+1 ( ! ) and this will bring up a render graph which will give you visual feedback of what is actually happening (I think its the red bar that is of main importance), this in turn can help in discovering how bad the problem is / isnt.But the main point is, try a video outside of MediaPortal first (I use VLC Media Player) to make sure changing the refresh rate via the nVidia control panel works, as if this does not work here, then it will not work in MediaPortal either.</blockquote>

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