I think currently SLI isn't what it could be. But I do believe that as the software continues to demand more and more from video cards that its going to come to a point where 2 graphics cards will be a huge benefit, IMO. I'm trying to build a pc that maybe right now has some features aren't a huge benefit but in a 2 years it could be. I can't afford to buy a new computer every 2 years, nor do I want to. I'm hoping that by paying a bit more now for features like SLI that I'll be able to add another card in a couple years and keep my computer up to par for another year or so. The graphics card I buy now isn't going to be near what its going to cost in a couple years so I'll get a cheap performance gain at that time. At least this is what I'm hoping for....