So this happened to me over 5 times. today i was just playing war thunder, but i had to tab out to see who sent me a message. alt tabbed, i opened Opera, then as i moved the cursor towards the messenger button, the cursor slowed down, then everything freezed, then system reboot happened. but system reboot is not always. if this happens sometimes it restarts the whole system sometimes it just freezes. i did not have this problem with my GTX 1050. after i upgraded this started to happen. at least its not frequent. i dont know whose fault is this, maybe gigabyte maybe amd AMD. when crash happens, the Power Indicator LED on the GPU does not blinking, so power is normal.
i flashed the latest vbios, nothing changed. Temperatures around 60-70 Celsius while gaming.
GPU: Gigabyte RX 5700 XT GAMING OC 8G
CPU: Ryzen 5 3600x @3.8-4.2GHZ
Mobo: Asrock AB350PRO4
Ram: 2x8GB G.Skill Aegis 3200MHZ CL16