I recently upgraded from a Nvidia 8800GT to a GTX760 and in every game but DayZ, I've noticed a massive performace increase. In DayZ, I'm limited by my processor. I've tried all sorts to improve performace, but I have a terrible lag problem. What happens to me is unlike other accounts that I've read regarding the AMD FX8350. I'll be playing DayZ for a few minutes, and it runs just fine, in towns the frame rate can get a bit choppy, but not much. I have the video options between normal and high because i read that setting things to Low means more work for the CPU, and my new graphics card can easily handle it... But then it starts... every minute or so, I will go from 30-40fps (estimating) to below 10fps for 2-10 seconds. When this happens, I've noticed that my processor in the task manager appears to go idle. The cores that are running DayZ will go from 40-60% right down to 10%. I've tried changing my BIOS setting Cool n Quiet to disabled, but if anything this made it worse. I've tried changing the cpuCount/exThreads and other things in the program options but this doesn't help either. When I do change the cpuCount and exThreads I've noticed it uses all 8 cores, but it does not appear to improve performance. Weirdly, since going from 8800GT to GTX760 it's developed this problem which makes it almost unplayable. Just imagine, every 1-2 minutes it slows to 5 fps. It's unbelievably frustrating, because it's as if my CPU just decides to take a break from all the workload. The CPU fan doesn't get too loud (although it does noticably spin faster) but the temperature stays pretty safe, so I don't think it's overheating. I have also changed my PSU in recent weeks but it's the same model as the last, a Corsair Builder Series CXM 600W Modular Any suggestions? EDIT - Should also mention that I'm running it from a Samsung SSD and have 16GB RAM