Hawaii didnt beat GK110
GK 110 fastest GPU was 780TI/Titan black and 290x beat only cut-down GK110.
After the PS4/XB1 landed and its games started coming over to the PC, it did.
Not only the 290x consistently tied and beat the 780Ti after a while, it also closed its gap to the 980 down to an average of 10% with a few driver releases. At 780Ti and 980 launch the difference was sometimes gigantic. I mean, the 290x was 10-20% below the 780Ti at its release. Impressive catching up on the red side.
This is probably due to driver work on AMD's side, having GCN on both consoles which automatically tilts the balance to AMD's side (although I wouldn't be so sure of this point, we all know what Maxwell brought on nV's side, gameworks or not on XB1/PS4 games, also relative to Kepler), and having aftermarket 290/Xs that do not throttle and run at full speed as they should.
The 280x/7970GHz also closed the gap to the 780 by a similar degree, sometimes tying it too. Who would have thought an ancient GPU like Tahiti could have such a long useful life and good aging? You can't say the same about Kepler parts.
What about driver quality and release cadence? Don't forget multi GPU profile updates which AMD drags its feet on. They have to catch NVIDIA on all fronts, not just the hardware.
AMD's drivers aren't a problem when used on a single GPU. I can tell you that after a reference 4850, a 6850 (xfx, custom PCB), and now a Tri-X 290 (reference card with decent cooling). That's 7 years of dealing with AMD's drivers, never had a problem, everything works as it generally should and I usually update the day the new drivers are out. nV's are the same in that regard from what my friends who are single GPU nV users tell me.
If they get the release cadence back on track, it'd be great. I don't mean a monthly driver as it was a few years ago, but for example a driver every two months with game profiles would be a good solution to the actual situation.
Somehow AMD can't get rid of ATI's crappy drivers stigma back from the pre radeon 7000 days. My 9600XT back in the day didn't give my any issues either. Maybe I got lucky.
When you go multi gpu... if it works, XDMA xfire (Hawaii) is a superior solution to nvidia's SLI in terms of frame pacing (this isn't so in previous implementations). If it works. If SLI works. Lately multigpu support isn't what it used to be, both sides of the fence.
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Back on topic, how do you imagine an air cooled 390x if that short PCB ends up being true?
This comes to mind:
The 660Ti. Here you can't use a blower, I don't think AMD dares to go back to blowers after the 290x's example... how do you mount one of these heavy open air coolers we see on the 290/Xs out there with such a little PCB? That card will probably bend with that much weight hanging off it.