Hi, I got a 4k monitor and my GTX970 causes an instant hard-reboot if any 3D load is on the GPU in 4K. Non GPU intensive, non 3D apps never crash. However the same system running in 1080p will run fine video games and video benchmarks all day and night. It is not a temperature issue, I tried many video drivers, tried different cables, PSU, different GTX970. The reboot issue has something to do with the GTX970 GPU running in 4k and having any load put on it via a game or OCCT, even a 1% GPU load test. I suspect there is a setting or driver change that can fix this. I appreciate any help. Thank you.