I'm building a skylake gaming computer, and my budget is somewhat limited. As it stands, I can either buy one 960 now and then another in a few weeks to a month and SLI them, or wait a month or more to be able to buy a 970/390. At the moment I'm very much leaning towards the SLI setup, as I wont have to spend a month with no card and unable to play anything. from the considerable amount of research I've done dual 960's will also outperform a 970 in almost every scenario except for at 4k and with games that utilize a lot of ram, so to me that justifies the extra trouble of an SLI setup. I have a nice roomy case with great ventilation and extra fans, as well as a 750W gold + PSU, so power draw and thermal output shouldnt be much of an issue.