Current state of SLI & Crossfire?

[RatmanGB]

I've only used SLI once in modern times with a pair of GTX 260s (I had a couple of Voodoo IIs long ago), and then not for very long, but it did seem to work well in the games I was playing back then.

I see a lot of threads about SLI/Crossfire being broken in such and such a game, not working, display problems and so on, which is a bit of a surprise as I thought it'd all be working fine by now.

Does SLI/Crossfire work in the majority of cases, and is one better supported than the other?

As I mentioned in a previous thread, I've been considering buying two cards for two PCs and then Crossfiring one of them and buying a new card for the other later on, but is this a realistic option?

 

[RatmanGB]

By the way, if you are gaming @ 1080p then there is absolutely no need for SLI/CF. Just buy a 970 or 980.

I am currently gaming at 1080p, and one card will definitely be enough... for now. What my housemate and I did before was buy two GTX 260s, and when the GTX 480 came out we stuck that in one PC and SLI'd the GTX 260s.

Unfortunately we ran into a compatibility problem with the GTX 480 and my motherboard, so it went in her motherboard where, other than sounding like a jet engine, it's still working fine. We're looking to do the same thing now - one card for each PC, then Crossfire/SLI when it's next time for an upgrade.