[Need help] Computer randomly shutting off

MortenxDKx

Honorable
Jan 28, 2015
9
0
10,510
Greetings

First of all I am not completely sure where this belongs, so my apologies if I posted it the wrong place.

I recently assembled a desktop PC for a friend, which for some reason shuts off randomly. It's a hard shutdown where everything powers down in a second with no BSOD. It seems to only shut down in games, but sometimes it'll run Dragon Age: Inquisition for hours and sometimes it won't run CoD 4: Modern Warfare for 10 mins.

Specs:
MSI B85M-E45 Mobo
MSI GTX 970
120 GB SSD + 1 TB HDD
8 GB Memory
Ocz 600w modxstream pro PSU
Intel Core i5-4590 CPU

The PSU and GPU were parts taken from my own desktop since I upgraded, and they worked like a charm before removal.

The list of what I've tried:

Reinstalled OS
Tried different Memory (from my own, working desktop)
Checked temps (CPU max 57 degrees and GPU max 71 degrees from what I saw)
Plugged all cables out and plugged 'em back in


I fear that it might be the PSU or Mobo, but is there a way to check it? Could it be caused by driver problem or something else entirely?

Thank you in advance. I will post any information necessary if you need it.

 
Solution
just enter bios and let it run for ~ 10minutes without doing anything
then just click around without actually changing anything

if it doesn´t crash, update the bios
check if the pc crashes inside BIOS as well. If not:
update the bios of the motherboard in BIOS itself, not in windows!
use the BIOS integrated tool m-flash

deactivate C-Power states inside BIOS. I don´t think the PSU is compatible with the "new" haswell power states.

edit:
also the 4590 is a haswell refresh and is supported by BIOS version A4 (10.4) and after

edit2:
C-States deactivation:
BIOS -> OC Menu -> CPU Features -> Intel C-State to disabled
 

MortenxDKx

Honorable
Jan 28, 2015
9
0
10,510


How do I see if the pc crashed inside BIOS?