I have this problem since i change my rx 480 to rx 5700. Just random black screen while playing cs go, system not responding, only hard reset helps. Any other heavy games, stress tests, and benchmarks runs fine. My system was i7 3770 ,16 gb ddr3 1600mhz, asus z68 mobo, 700w bronze psu. Now i changed my platform to Ryzen 2600, 16 gb ddr4 3000mhz cl16 ballistix sport lt, asus prime b350m-a mobo, made a clean install of the lastest build of windows 10 pro 64, problem still not solved. Crash is not manually reproducible, its absolutly random, one day i can play without any issues, another day i have a few crashes in a row.
