After thousands of attempts, I think I've found a solution.
Not exactly an absolute solution, but more likely a stable workaround.
I must premise that consequently to this error, I discovered I had RAM badly configured. Like other people with this error, I've got two modules of cmk16gx4m2b3000c15. This module is nominal 3000 Mhz, but it worked on around 2000. I raised this value to 3000 Mhz through BIOS and the computer totally stopped working! I could not access even into the BIOS. I had a red light on CPU on my MOBO leds. However, updating the bios, I solved this first problem.
As regards the display driver error, I solved the issue lowering GPU maximum frequency.
Like you wanted to overclock your graphic card, you must access your card deep settings and slightly (SLIGHTLY) lower GPU max working frequency and slightly (SLIGHTLY) increase max voltage - actually, this is an underclock.
In my specific case - I've got an AMD RX 570. You must open the Radeon Software and go to PERFORMANCE > TUNING > TUNING CONTROL (=Manual) > GPU Tuning (=Enabled) > Advanced Control (=Enabled) and Voltage (=Enabled). I moved the State 6 and State 7 value to 1300 (it was 1326 and 1360) and raised the State 7 voltage to 1160 (it was 1150). I had this problem with specific games, so I created a specific profile for these games with the above-mentioned settings. After applying these settings, my games stopped crashing at all, even after very stressful tests, with every graphic setting maxed out.
Sorry for my bad English, I hope this solution I've finally discovered will help someone else in my situation - I lived like an entire year with those random, weird crashes. If you decide to adopt this solution, I suggest you to modify frequency and voltage value by the smaller quantity you can, a little bit at a time, and always test your settings before increase that value; even minimal modifications of these parameters may affect your system stability. Also remember to apply changes after every modification.
