Time and time again, the recommendation from people in the know, as far as multi-GPU approaches from ATi and nVidia (Crossfire and SLI respectively) go, is to avoid as there's issues. Fairly substantial ones, at that.
For a game to be multi-GPU compatible, it needs to have the appropriate code in the game to allow the cards to play nice, the drivers need to be firing on all cylinders, graphics card profiles need to be assigned, the graphics cards need to be as identical as you can get them, there's a doubled risk of component failure, your motherboard needs to be compatible, your PSU needs to be bigger, your case needs to handle the heat of 2 graphics cards on top of CPUs, hard drives... the list is eventually exhaustible, but still long.
I love it. And here's why...
