In my previous system (with vista 32-bit) I had been able to install an Nvidia GF6200 PCI video card in conjunction with my primary GF7800 AGP card.  I just uninstalled the drivers, installed the second card, and re-installed the newest drivers and everything worked perfectly.  I used the AGP for the primary monitor and the PCI card for both secondary monitors.  I've read of this working identically on PCI-E systems, should work with an SLI system but it's probably something you're just going to have to try out if you want to do it this way.  

 

I've read that the third card should be nvidia if you are going the PCI route for the third card, but that ATI may be a good choice for the third card if it's PCI-E due to some problem with the Nvidia drivers recognizing two cards in SLI and one separate card on the same PCI-E bus, but that might just have been older drivers.

 

With my current SLI GTX280 setup, I have card one driving my primary monitor and card two driving both secondary monitors.  Then when I want to play a game I simply use the Nvidia control panel to switch from non-SLI mode to SLI-enabled mode, and this disables both secondary monitors and uses my primary monitor only.  When I'm done gaming I switch back.  Currently it's not possible to use SLI-mode on more than one monitor, but there are rumors of future releases of the Nvidia drivers that will enable SLI with more than one monitor at a time.

Also, besides TripleHead2Go, are there any other products out there that do the same thing?

That's my main dilemna; I'm trying to play 2 instances of the same game at once.  Currently, I am running 2 separate Vanguard accounts at the same time on each monitor, so having gaming gusto for both monitors is a priority. TripleHead2Go looks like the "best" option, but throwing down $400 for an expanded desktop makes me want to cry.  I'm not looking to play one game at an extremely wide resolution, but instead 2 games over 2 monitors without losing much in the way of graphical performance.

Ah..

 

The future SLI multiple monitor set up (whenever it comes out) should work for this problem... but that is, whenever it does come out and if your system is supported.

 

You can't run one monitor per 8800 and get decent performance?  Albiet probably at a lower resolution and settings on each?

 

The matrox solution would work, but probably result in lower performance.  An SLI system usually only gains you 1x to 1.5x performance increase (for most games) so running each monitor off of it's own 8800 might result in better overall performance per game.  My thoughts anyways.

 

The problem is that according to the specs the 630 only has 2 x PCIe 16x (8 lanes per slot), 1 x PCIe 8x (1 lane), 1 x PCIe 1x (1 lane) and 2 PCI slots. So with 2 cards in SLI, and no PCIe 8x videocards out there, you can at best run a PCI or PCIe 1x videocard as a 3rd card. This will be very low performance compared to what you currently have (fastest PCIe 1x Newegg offers is an ATI X1550 or in PCI it's either an HD2400 or GF8400).

Ok, thanks for the answers.  I will stick with the dual card/dual monitor solution I am currently using until nVidia finally comes out with an SLI/Multiple Monitor support.  Thanks

Hi.

Heres a program that might work for you.

http://www.kegetys.net/SoftTH/

It uses software to run 3 monitors from 2 pci express cards(but not in sli), and its free. I havent tried it myself but have read positive feedback.

check out the latest Nvidia Drivers Reported to have dual monitor support in SLI

I just upgraded to 178.24 (latest non-beta) and I can't enable dual monitors from one card when in SLI. But haven't tried the new beta 180.42.