I have finally found what was causing my issue, Asus GPU Tweak II 1.6.0.5, i had but used pc much coz you could only use for a hr or 2 before crashing, just checked Asus Driver & Tools site for the rx580 n updates for GPU Tweak,GPU TweakII Ver1626Be...
Haven't OC'd cpu or ram, i use gputweak on gaming setting (1360mhz) but pc is quite stable gaming usually hangs when using outlook or moving files in windows explorer
have updated my chipset to 17.40 (https://support.amd.com/en-us/download/desktop?os=Windows+10+-+64) and updated to latest Adrenalin Edition 18.2.1, all working well 12+ hours of NFS Payback and no crashes *fingers crossed*Edit: still randomly black ...
iv got the same problem as fiveofeight with my Strix RX 580-O8G-GAMING, intel meltdown really was hell running crimson 17.12.1, but wattman errors have stopped, updates to Ai Suite III 13.00.13 helped with fan usage, gpu tweak 1.6.0.5 helped a littl...
Mine is doing the same thing but most of time I'm able to play NFS Payback for a hr or so n it doesn't crash but looking at chrome or outlook it crashes randomly