If I run Prime95 for an hour or so (with the GPUs at idle), the 980X gets up to about 77 deg C or there abouts on all the cores. I am not really a fan or antagonist of any large tech company (Intel, MS, ATI, Nvidia, etc....) but it seems that Nvidia has taken several deliberate steps over the last ~ 4 to 5 years to keep screwing their own support base. I used to own a 680 board and it had several low level engineering problems that should have been fixed before release. Now I have to use a custom hack to get my PhysX card to work with ATI GPUs and then they made Intel drop their chipset license over the SLI crap (until they turned face at the last moment). Finally the GTX 480 stuff (at least from my engineering background point of view) is just deplorable. And with all these actions, they keep upsetting the very enthusiasts who support them with the cold hard cash.

The best flight stuff out (that is aimed at the enthusiast and not the military or the super-rich) is from CH Products.