Total system crash during gaming

[Bonkeye]

I upgraded my system  with a EVGA NEX750B PSU and a XFX R9 280X. Now with the majority of games I play I suffer absolutely no problems yet with a small selection of games I encounter total system shut downs with no warning etc and my system won't turn back on until I've waited around 10-15 mins minimum. Temps are fine on both cpu and gpu and all drivers up to date. 

 

The software I have encounter this issue with so far are:

War Thunder

The Sims 3

Warface

3d mark 2013 demo

 

My system:

XFX R9 280X

AMD FX 8350

8GB Corsair Vengeance LP 

EVGA NEX750B

ASUS M5 A99X EVO R2.0 Motherboard

 

All components are at stock settings 

 

any help much appreciated

 

Thanks!

[Wiff]

lol I already had this two times in Battlefield 4, just a very short part of a second a window pops up and the whole system crashes

[BlackMamba]

what's your psu? 

 

EDIT: lol just read it nvm

[Bonkeye]

Just had a thought, my system seems to always shut down whilst on loading screens in all of the above games except for 3d mark, perhaps a issue with my hdd? Would that cause a system shutdown?

[dragoon20005]

check your GPU temps using GPU-Z

 

install Unigine and test if your computer crash?

[richaxes]

The GPU can be suspected, although I don't understand the 10-15 mins waiting time... it sounds more like a faulty PSU to me.

[Bonkeye]

Temps are fine, that was the first thing that came to mind. 

 

What I find interesting is it seems to happen on less demanding games, if it was a psu issue wouldn't it be more likely to happening on games with a higher demand on GPU? Also it always occurs during loading screen or in the case of 3d mark just before the end of the first test, seems very specific.

 

Thanks