I run my 780 at around 50ｰC with Divinity. What you have to realize is that alot of the times your hardware will be pumping out crazy fps 120+ which in turn wil have your GPU work at 100% which heats it up alot (and most Cooling solutions are simply inadequate to handle that stress in the summer)
What you can try to get this problem under control is to use the Frame Rate Limit in the options. Set it to 60 and you should see a big reduction in GPU load. In addition you can set it even further down, going to 50 makes a big difference as well as going to 40.
For example my rig is going to 80ｰC if I run with 120fps (this is on a water cooled system).
If I go for 60 fps it will hover around 55-65ｰC (depends on room temperature)
50 fps will cut that to around 45-50ｰC (I do prefer to run low temps so I can run my pc in silent mode)
