Now here's my complaint. As usual, AMD is not as good as nvidia is with dual gpu support. When it works, it works well: My performance in bf3, crysis 2, was much much faster than 580 sli.
If you look at the graphs at ABT and do the math, crossfire is more efficient. It's around 5% faster IIRC.
As someone who just had a GTX 460 SLI setup, let me tell you, SLI is far from perfect. I'm not saying that Crossfire is better, just that multi GPU is a waste of time IMO.
What do you mean by "support"?
It would be interesting to know who typically releases a multi gpu profile faster (amd or nvidia).
Well, i'm well aware of the pitfalls of dual gpu, the things I don't like about NV dual gpu setups is that they are typically extreme power hogs and generate a TON of heat, while so far the 7970 xfire immediately turns off the 2nd card when not gaming. Its pretty damn nifty to be honest with you. Produces a lot less heat and less noise than GTX 580 sli setup.
On the flip side of the coin, some stuff is just confusing. Batman: AC does not scale in xfire at all, in fact it does not even utilize the 2nd GPU - I have the MSI afterburner overlay and my 2nd GPU stays at 0%. This game has been out far too long to not have xfire support yet, while NV had it on day 1. And witcher 2, i've since got that fixed by using an updated driver (the 1/9 driver on the AMD website) so it is scaling in xfire now, both GPU's at near 100%.
I'll tell you i'm mighty impressed with the 7970s despite the shortcomings, and to be honest i'll probably prefer that system for personal gaming. That my friend is how impressed I am with the 7970, it is good hardware. But its downright confusing how AMD has taken a month to get xfire profiles out for various games such as bf3 and such. And still no profile for skyrim and batman: AC. All that said - the hardware is ridiculously good, especially when overclocked. And most games DO work, i'm just pointing out some that don't. Since NV really stepped it up in terms of getting SLI drivers out fast, I think AMD should do the same. Its only fair for customers that spend 1200$ on AMD GPU's right?! They just released a CAP today, so hopefully they got the message. I understand they had shakeups recently and what not, hopefully they'll fix this.