Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
FWIW using MSI's Afterburner monitoring utility in Windows, I've been able to measure the temperatures on my D300s.

With intense gaming, the GPU temperatures increase steadily up to 85 C, then at exactly 85 C the fans kick into high gear and stabilize the heat. I've never seen the temperature go above 86 C, which should be safe for these cards.

I expect the D700 has a similar fan profile.
 
It seems to me that dx11 mode works better than mantle on these GPUs currently. Smoother and the same fps.
 
It seems to me that dx11 mode works better than mantle on these GPUs currently. Smoother and the same fps.

Yea I been trying both not sure I can tell the difference.

With everything possible maxed out at 2560x1440 I am getting 95-117FPS
nMP 8 core 1TB D700
The D700 crossfired is def faster than my older Superclocked 680

Really impressed :)
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.