I can imagine that it's plenty faster in AMD-optimised games. And it's probably about matching in DirectX 12.
While the 980Ti is the more powerful card on its own, CrossFire scales better than SLI (~95% vs ~70%). Dual Fury X are actually faster than dual 980Ti. Fury X also supports true Async compute.
Yeah with Async and Dx12 i think Amd is on the strong side. Heres link to one of benchmark. http://forums.anandtech.com/showthread.php?t=2470097 I know there isn't FuryX cards but 290X is close to 980Ti so thats a thing. BUT atm Nvidia hasn't got its game on with async yet, some test shows that if nvidia gets it together soon it will match or beat amd.
I find it highly unlikely they ever will, the current generation cards just physically don't have the compute performance to add. The reason the AMD cards have such a huge performance boost in async compute is because in non async tasks a decent number of the compute units on the GPU are being under utilized and inefficiencies are not allowing those compute units to be used. That means about 10-20% of the GPU is not in use for alot of the time, hence the massive boosts with async compute. With Nvidia they physically don't have those async compute engines built into the GPU, this means that no amount of drivers can ever add that. This video explains it in alot of detail, its pretty technical overall though.
It's enough for someone who needs a computer but can't spend more than $100 on it. I have one that is even older (a Dell Latitude D610) and that is operational. It won't play anything newer than 2004, but it's not about gaming. It's about working on the go. It does word processing and can run python scripts, and that's all I need it to do. For some people, just being able to, say, check their email or write a resume without going to a library or internet cafe is huge. Those are the people who would buy something like that.
Of course, a major knock against the Fury X crossfire is that, as far as I know, every Fury X available has a radiator for its liquid cooling, and managing multiple radiators can be difficult or impossible in most computer cases. (If there is an air cooled Fury X available, please ignore me or shame me for being an idiot)
i am now using my new pc for nearly a week and i have to say im astounded how well this thong goes for the money i have spent on it i can run every game i tried on maximum settings and thats just awesome for a 600€ build
if your in a position to run a duel fury x setup, than not having a place for the rads is most likely the least of your concerns.
i bought it used in a small store where i live he asked 200€ for it because he wanted a 960 (massive idiot alert in my oppinion)