VGA crashes mid game with new build with ryzen 3000

[Mateus Montemor]

Hi, i just builted my new PC last friday(one week ago) and tuesday was the first time i was able to full game all night long with my friends, and then this problem started at CSGO: After a while playing(20-30 min) my screen goes black, the red ez debug VGA LED on my MOBO lights up and it stays like that for a minute, than the system reboots normally, what could it be? I only played CSGO and it only happened there, using the PC normally all these days it didnt happen and today i tested with MSI Kombustor for like a hour, no overheat (max temp 67C), no artifacts on its scan, nothing, but now playing csgo again and the trouble cameback, also after that i went and played 1 hour of rocket league and nothing wrong . I already tried reinstalling the drivers and different versions of it (gpu drivers), tried changing displayport cables and the port on the gpu, changing the cable from psu to gpu, and many more that i was finding on the internet, nothin changed, any suggestions of what could it be? 

ps: i recorded a video of it, since its ez to replicate the problem just need smoke in a corner and a lot of bullets https://www.youtube.com/watch?v=BdOJmRqBiCc - the red light on mobo has VGA on its side and by the manual is the ez debug vga light - no vga found/installed