[quote name='SEH']I used to run Xfire and SLI setups, but not anymore. Its too much of a hassle to make sure stuffs working correctly, and I'd always have weird issues with stuttering caused by Xfire and whatnot. Now I just go with the best single GPU and call it a day.[/QUOTE]
This has been the case for every single person I know in RL that went with xfire. I've seen the problem first hand at LANs with the most competent of PC gurus. So unless you're making Toy Story 5, just go with 1 card.