1.) Check to make sure you have a large enough power supply (i.e. make sure you are not over drawing power)
2.) Check to see if your ram, cpu, gpu, are all fully seated. Re-seat them to make sure.
3.) Make sure your system is as dust free as possible.
4.) double check all power and data cables are securely connected to their devices.
5.) disconnect ALL peripherals EXCEPT keyboard and mouse, and see if the issue persists.
6.) verify game cache.
7.) defrag game drive if NOT on SSD
8.) double and triple check to make sure you are not having overheating issues.
9.) maybe upgrade the amount of ram you have installed, from 8 to 16GB....
Just a few thing to check to make sure it's not a hardware related issue...
