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I own the w1070. and no, it can't do 3D at Full HD, in anything other than 24hz per eye frame packing, which is unplayable.

The only way to play is at 1080p60 SBS, which is half horizontal resolution which is 960x1080 / 60 per eye. Or you drop down to 1280x720p120 with 60hz per eye, and that works with 3D Vision whereas the former works only with Tridef and is pretty annoying to get working. But that's more NVidia's fault for not adding SBS to their specs. Somebody over at that company should get slapped across the head for being so obtuse. It's like they don't want our money or something. Actively discouraging people from gaming at 1080p because you can't get 60hz in their ecosystem. Dumb dumb dumb

Thankfully with HDMI 2 and 4K projectors we should have 1080p / 120hz pretty soon. Actually HDMI 1.4 could do it but hardly anyone ever implemented the 1.4 300mhz hdmi input chips. I looked into possibly ordering one from TI and trying to hack it into my projector, but decided it's not worth it. I'll just wait until a better projector comes along with better blacks to get my 120hz 1080p gaming.
 

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Technically hdmi 1.4a should be able to accept 1080p / 120 in 2D in terms of bandwidth if they allowed 420 encoding. But 420 was only "officially" added to HDMI 2.0, which doesn't mean it can't be back-ported it just means the firmware needs to be updated. We know the w1070 can handle 120hz at 720p, so 120 at 1080p using 1/4 chroma subsampling to cut the bandwidth in half should be possible. Unfortunately I don't have the source code to the firmware otherwise I would have tried monkey-patching it myself.

There are some 1080p/120 projectors out there, but they are expensive. You could always try buying two w1070s and do passive 3D with polarizing filters. That would get you 1080p/120 with crazy good brightness. You'd need a processor to split the left and right signals from the graphics card. Some people try to do it via a two-frame SBS mode and use one hdmi out on the video card per projector, but I'm not sure how easy that is. That would save you a demuxer to split the 1080p 3D / 120 signal into two 1080p / 60 2D signals. But there are left / right sync issues I think with that setup, one eye can be behind the other by a frame. Not sure if they fixed that bug in the driver yet.

Might want to check over at geforce forums to see if there are any decent 1080p /120 projectors for not crazy prices. HDMI 1.4b is supposed to handle the bandwidth for 444 at 120hz, but the number of devices that actually use the 300mhz TI HDMI scalers is very small.

Best plan is to wait for 1080p projectors with hdmi 2 ports and a sticker on the box that says "we support 120hz in 2D or 3D". 120hz in 2D would be a terrific upgrade for windows desktop and frame interpoling movies. I use SVP a lot because I hate motion judder, and I recently tried dropping to 720p to try it at 120hz and it looked GREAT. 120hz is super awesome. Less input lag, less blur.
 
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