I had the same issue for months on a windows 7 system and the only way to get around it was to disable GPU acceleration as noted. It was time for a computer upgrade so I bought a maxed out 27" iMac for $3600 thinking it was time to move to a Mac. Installed Adobe CC and Premiere Pro CC 2014 and Media Encoder and all ran fine with no issues for a couple of weeks. I noticed the other night that adobe premiere pro was using Open CL and there was no option for CUDA. Even though I was getting great performance I wanted to see if there was any difference with CUDA plus Neat Video used CUDA and can not use Open CL so I figured it would benefit from installing it. Now after installing CUDA I am having the exact same problems I was having on my Windows system. At this point my thoughts are the problem is with CUDA. It took me awhile to find info on how to manually uninstall CUDA but I got it done and after editing for an hour or so I have not had any computer freezes but it will take a couple of days before I am sure. I will report back if I continue to have any issues and CUDA was not the issue.
Also I ran performance tests to compare Open CL vs CUDA and there was no difference in render times in Media Encoder or performance of Premiere Pro except where I had Neat Video applied, it got about twice the frame rate because Neat Video with Open CL would not use any acceleration at all so that was really expected.