chainers :
so is this benchmark wrong, or does a crossfire 480 really outperform a 1080? If so, whats the point of the 1080, if the two cards will outdo it for 2/3rds of the price?
http://www.tweaktown.com/articles/7770/amd-radeon-rx-480-crossfire-beating-geforce-gtx-1080-4k/index7.html
It's not wrong, but does deserve several caveats. Multi-GPU support in games is better than it ever has been, and is getting better all the time, but it is still a far-from-ideal solution. For the best game experience every time, you should always go for a single-card setup if possible.
If you're buying one card now (whatever that card is) due to budget, and want to have the option to add another later to help with higher resolutions or frame-rates (perhaps because games have gotten more demanding since you purchased the first one, for instance, and are now really taxing that first card), or upgrade monitors and want to buy the inexpensive second to help, then multi-gpu can really help......knowing that it sometimes will be imperfect (stutter-y, texture/lighting flickers, or just not work at all).