Launching games causes my computer to completely shut down.

[MyThickPanda]

So about 3 weeks ago this started happening. I can basically use my computer to watch videos and stuff without anything happening, but every time I try to run an intense game, my computer shuts down. And when it shuts down, the monitor goes black and all the fans stop working completely. Also, once it crashes like this, pressing the power button does nothing. So to make it work, I have to turn off the power going to it, hold down the power button for about 3 seconds, turn the power back on and THEN I can start my PC. The games that ive seen make me crash are CS:GO, Trove, Dead space 3 and Minecraft. With CS:GO, I can go to the main menu but once I try to load into a game, it crashes halfway though rendering the map. But if I try playing with the lowest settings, it works fine. Trove and dead space simply crash my PC when I try running them. And with minecraft, I crash when I try to run it with shaders, but WITHOUT shaders, I can play it fine. Also, when I turn off my computer and I don't use it for like 4 hours or so, it turns on and the fans start spinning, but 3 seconds after I hear it turn on, it just shuts down, and the fans stop spinning. And when it does that, I have to do the same thing where I turn off the power and hold down the power button for 3 seconds. And ive tried another graphics card, and it still does the same thing. I even tried to update my graphics drivers, and nothing. I REALLY want to know how to fix this, since I basically cant play any games and its REALLY frustrating! someone please help me 🙁 . And here are my specs

GPU: Radeon r9 270
CPU: AMD FX8350 8-core
RAM: 8 GB
HDD: 1 TB
PSU: Thermaltake TR2 500 watt

 

[Supernova1138]

Sounds like you might have a bad power supply, or at least one that is struggling to handle the combined load of your graphics card and your CPU. Try swapping out the power supply and see if that helps.

 

[DSzymborski]

I'd suspect a failing power supply too, given the symptoms and the possibly low quality of the power supply anyway (some of the TR2 are quite awful).

 

[RazerZ]

Another vote for the power supply. Replace it with a good quality unit.

Any one from tier's 1-2 should work great: http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html