There have been some pretty crazy gains, but for certain combinations.
The more CPU limited you are, the more you gain. For a single high end card with a high end CPU it's a lot less (perhaps closer to driver update gains). They claimed 290x crossfire gets up to 58% gains.
It's hard to decipher the results as a whole. A lot of posters seem to push the review which coincides with their views. Keep in mind this whole release is like a first version beta.
Where are the crossfire results?
I really want to see if the 290x crossfire has gone up, and how far.
If crossfire has such an advantage from mantle I think it will benefit every CPU.
The claim was amazing, but is it valid?
This pretty much sums up what I've gathered so far.
As pr. the part i've bolded, this may well be the most active mantle thread on the whole of the interweb but it is problary also the most polluted. A shame how a pure numbers game can turn into something entirely different.
I'd be very much interrested in seeing CF results too, but not only CF, tri and quad as well. There is reports of upwards 100% gain on old running hardware such as core2duo's. In principle we should be able to push that CPU / GPU ratio into the highend as well, hex core ivey running tri or quad fire.
To understand the nature of a phenomenon, as a good scientist, you should push the extremes, where do we gain the most and where do we gain the least. We've got the "least" part down, and its close to 0, but I dont think we've seen the high end yet.
Speaking of, where is the Anand review? Not preview, review? Is it because its a beta product or are they just taking their sweet time and getting it right?