Chosen Solution

Hello team, I’ve worked with my Samsung R580 so much, but I dont seem to get a finish of this problem. So, when I start up Samsung, there is no problem. I let it stay in stand by in the desktop in hours, no shutting down. I can hear the fan going, so no problem there. BUT when i start for example Youtube and watch 2-3 videos it shuts off. I’ve changed the cooling paste on the CPU, I’ve cleaned the fan. But still- The same behaviour. There is nothing that blocks the fan intake. I dont know where to look anymore. Please guys, I would be very happy if you could help me, Tommy

Bad RAM wouldn’t shut the PC off. As you already replaced the PSU, I’d guess either Overtemp or Motherboard.