PSU shuts down the whole system in some games

[KirillMysnik]

Hello, community!

I've got a 5 years old computer. I've bought MSI Radeon HD 5870 back then but it obviously had some troubles with cooling, because when I was playing games sometimes it was making horrible sounds, sometimes I was experiencing artifacts and sometimes my computer just freezed for 10 seconds with a gray screen. All these problems were solved by changing graphics card thermal grease.

But there was another problem with STALKER games which hasn't been solved by changing thermal grease. Whenever I try to change settings through game menu, my computer turns off. Not a restart, not an OS shutdown, just as straight as if I unplugged it. And it won't turn on again until I manually turn PSU off and on. This problem appeared on multiple STALKER games in the same place - settings menu. But I didn't play STALKER much and never launched these games again since then. So I just forgot of this problem.

Now it's 2015. I've bought a new graphics card - PALIT JETSTREAM GeForce GTX 970. Everything works fine, I can play all my games on ultra with high fps. But yesterday I tried to launch GTA BoGT which worked fine with my old 5870 before. And guess what - my computer turned off on a loading screen. Exactly the same thing that happened with STALKER years ago.

When it first happened for me in STALKER, I used to blame my graphics card. But now... They're 2 completely different graphics, NVIDIA and AMD. Now I think the problem is in my PSU. Just... what else? What else could shut down my computer so instantly?

My specs:
PSU - FSP Epsilon 80 PLUS 900, 900W
Old graphics card - MSI R5870 LIGHTNING 1Gb
New graphics card - PALIT JETSTREAM GeForce GTX 970 4Gb
Mobo - ASUS Crosshair IV Formula
CPU - AMD Phenom II X6 1055T

Unfortunately I don't have any spare PSU to check if it's a PSU problem or not, but I'm very certain it is. I'd like to hear your ideas and suggestions. Thanks.

 

[Math Geek]

from what i am seeing, this psu is not very good quality. though it is plenty of power for the system, it may not be able to handle the loads.

best thing to do is get a new psu and see if that helps. you can get one local and return it later, just to see if that is the problem. i would lean toward a software issue since it only happens with a couple games but then i can't hink of a software problem that would cause a shut down that needed a psu reset to start back up.

all signs point toward the psu as the problem.