Hello

I am thinking of upgrading my display to a widescreen triple display, I am going with 3 22" monitors and a mounting frame.

The question I have is this, I already have 3 video cards in my machine Nvidia 280 gtx in triple SLI and therefore could in theory drive each monitor with one card. Conversely I could buy the matrox triple head to go.

I would rather not spend the money if I didn't have to as this is getting expensive as it is. Can FSX be spread over 3 monitors without the triple head 2 go?

I got the Triple Head 2 Go... and i feel it surpasses multiple video cards in one aspect, it is not hardware-dependent...

the main benefit of the TH2Go is it's portability, being able to keep your 3 screens when you change your hardware, regardless of which or how many GPUs you have

the down side though, is that, when compared to a triple GPU setup, the very high resolution imposed by the TH2Go is very demanding on hardware, and will somewhat lag your system if you don't have the horsepower to back it up... but given that you DO have 3 GPUs, i don't think it would be your case  

SLI for FSX doesn't yeald much gain on FPS, except for very high AA and resolution situations, which a triple monitor setup pretty much implies...

so, in my view, you have 2 options:
one, have your 3 cards working as one in SLI mode and hook up a triple head in the primary output... this i would recommend if you didn't have top notch cards, and had less than 3 of them while at it 

or, which i think is more sensate in your case, just use one GPU per screen, and be happy   ...i think you'll have to disable SLI for that.. but when your cards are GTX 280s, who cares, right?  

Cheers