Graphic card shutting down pc, no overheating problem

Hrotger

Prominent
Apr 2, 2017
5
0
510
Hi,
firstly i checked a lot of other threads here on forum and in other places for this problem but most of them are not similar to my problem.
My PC:
CPU: Intel Core i5-3330
GPU: Asus GeForce GTX 750 Ti 2gb ddr5
RAM: DDR3 Corsair Vengeance 2x4GB
MB: ASRock Z77 Pro3
PSU: COOLERMASTER V550 GOLD (RS-550-AMAA-G1)

My PC was working perfectly for 2-3 months after i assembled it.
I mostly play some Witcher 3 on high details, League of Legends and World of Warcraft.
Week ago my pc shut down itself while playing Witcher 3 then it would shut down after playing 15-20min of Witcher 3 and after similiar time of playing WoW.
When i play LoL there is no such problems, i can play a few hours and everything is fine.
When browsing internet etc. everything is fine too.
I checked temperatures and all of them are normal.
Max GPU temp was 67 when playing witcher 3.
After pc shuts down itself i have to unplug it from electrical outlet and wait around 5min to turn on it.

I checked how pc would work with integrated graphics and everything seemed fine in witcher 3 after like 20-30min of playing.

Besides after changing option in bios to use integrated graphics and then unplugging my video card and then after testing plugging it back again my monitor doesn't work until start of windows (i don't see bios etc. now)
Do i need to reset BIOS settings?

First thing would be to check how my pc would work with another psu but i think it's quite weird it works with some games perfectly fine and with others it just shuts down without clear reason.
Maybe it's some driver problem?

Thanks in advance for all solutions.


edit: i checked event log and there is only error 41. My system is Windows 7
 
Solution

It could potentially be a problem with the PSU, but I really don't think that's a "low quality unit", judging by the positive reviews it's received at hardware review sites. The Cooler Master V series is also positioned rather high in the PSU tier list here. If it does turn out to be a PSU problem, it would probably be worth sending it in for replacement under its 5 year warranty.

And just because the PSU core temps might be reasonable doesn't necessarily mean that some other component on the graphics card (or motherboard) isn't overheating, or has other problems. It is...

It could potentially be a problem with the PSU, but I really don't think that's a "low quality unit", judging by the positive reviews it's received at hardware review sites. The Cooler Master V series is also positioned rather high in the PSU tier list here. If it does turn out to be a PSU problem, it would probably be worth sending it in for replacement under its 5 year warranty.

And just because the PSU core temps might be reasonable doesn't necessarily mean that some other component on the graphics card (or motherboard) isn't overheating, or has other problems. It is only a 60 watt card, so it shouldn't put that much load on a capable PSU like that. If you have another PSU on hand, you would probably want to test with that, but it might also be good to test with another dedicated PCI-E graphics card too, particularly one with equal or greater power draw.
 
Solution

Hrotger

Prominent
Apr 2, 2017
5
0
510
I replaced my PSU with an unit borrowed from a friend and it solved all the problems.
My PSU still has warranty so i will try to replace it.
Thanks for the replies.
EDIT: just for reference my pc is working fine even under load with 350W PSU that i borrowed.
Components are pretty low wattage but people these days are recommending 500W for even lower wattage units and that is quite surprising for me.