Originally Posted by motorman45
I think a good home theater PC is a great way to demux 3D as well as you can game on it, play all kinds of media including from the net, google earth is amazing in 3d on a big screen. and its nearly the same cost as a demultiplexor set, splitter and player
If you use a PC you still have to be a little careful for your choice of graphics card, otherwise you'll run into Sync problems between the projectors.
Ideally, you'd want a graphics card able to lock multiple outputs together (frame-lock). This feature is only available on professional graphics cards like Nvidia Quadro or AMD Firepro.
However I found a work-around for consumer cards which only works on AMD Radeon cards : Eyefinity.
Eyefinity is designed for gaming with multiple monitors side by side, it merges the desktop of multiple displays into a single large surface so that windows and applications believe there is only one single giant panoramic screen, and the AMD driver tries to lock the displays in sync (hidden frame-lock). All you have to do then is to display your 3D content side by side full screen.
So far only AMD Radeons support this for 2 displays.
Nvidia Geforce have a similar feature but you have to have two graphics cards in SLI and it requires 3 displays (you can't use just 2)
There's just a little catch with using AMD Eyefinity : if you want perfect frame-lock : you have to use absolutely identical outputs : from the plug at the back of the card, to the possible converters you might want to use, so be careful at the available plugs at the back of the card when you buy it : I've got the latest AMD Radeon 7970 gaming card and I had to buy extra mini-DisplayPort adapters to make it work.
If you try to use different outputs, you'll loose the sync and get tearing on one of the displays.