Originally Posted by azanon
Because it is troublesome?
What's more likely to fail, a system running one video card or two? (This is not a trick question). Because several games don't support it. Some don't even work right with it on, including new ones where they haven't spent sufficient time in QC/QA on SLI compatibility. Of the ones that use it correctly, its twice the cost for ~ 30-50% more performance.
I recommend SLI to folks with lots of money who enjoy troubleshooting, or who have 30" LCDs.
There are better AA modes than what a single card offers? Heck, I just have one, and I can do 16x with transparency. Geez, who wouldn't be satisfied with that?
A properly setup SLI system is no more susceptible to failure than an non sli system. My current rig is my second SLI system, the GT280's will be my third.
I don't have "lots of money", I don't enjoy troubleshooting (though I'm certainly capable of it), I do have a 30" LCD, and yes, there are better AA modes than a single card can offer. In fact you probably haven't even seen all the modes your single card is capable of. Try using nHancer to enable the combined AA modes.