Pc turns off when playing games or stressing gpu?

Enrique767 · Sep 18, 2013

Specs:
cpu: amd fx 8320
gpu: amd radeon hd 7950
storage: 2 hard drives 7200rpm
memory: 8gb ram (2X4gb modules)
4 case fans
psu: 550w Cit gold edition

I can use the computer without no hitches when im browising the internet or watching videos. However, as soon as i play games or stress just my graphics card, my pc goes into some sort of power save mode where its unresponsive and i have to hard reboot. Also, no BSOD, Viruses etc but the display just goes black.

help would be appreciated

jinayhvora · Sep 18, 2013

its a PSU issue most likely, replace it

Enrique767 · Sep 18, 2013

is it possible that my system does not have enough power? btw ive done a clean install of the graphics drivers.

jinayhvora · Sep 18, 2013

yes, that's what i meant, that PSU is rated 550W but its a poor quality unit that does not really provide its rated capacity, so when under load it can't provide enough power
can u look at the sticker and tell me the Amps on +12V?

Enrique767 · Sep 18, 2013

it is a dual 12v+ rail with 16A on each rail. i thought that would be sufficient for the system? if not is this psu good for it?

http://www.amazon.co.uk/OCZ-OCZ600MXSP-UK-ModXStream-Power-Supply/dp/B001GLFD54/ref=sr_1_18?s=computers&ie=UTF8&qid=1379517783&sr=1-18&keywords=atx+power+supply

jinayhvora · Sep 18, 2013

don't get that one - get one from these brands- Antec, Corsair (except the CX Series), Seasonic, XFX

Enrique767 · Sep 18, 2013

ok thank you

i shall buy one to see if it works as i think it is the power supply. ill let you know if its the solution. thanks again

Feldmarschall · Sep 18, 2013

Hi,

Your PSU is crap. Sorry for language. If it has double rails with each on 16 amps it can't deliver 32amps out. This unit may not go over 25amps. Good units can't provide full current on both rails. Your CPU is TDP monster (125) + 180-200W in full load on your Radeon. That's not nearly enough.
You need to get better unit. Much better unit.

Best regards

Enrique767 · Sep 18, 2013

is that why my pc would turn off even if i just stressed the gpu? btw i just got the card yesterday so i was just wondering. i suppose i wont buy that psu ever again lol

Feldmarschall · Sep 18, 2013

It is possible, and probable especially if that PSU can't combine two rails... which would not suprise me.

However, you'll need to get good PSU. That is start no matter what and that's the last place to be cheap with.

Enrique767 · Sep 18, 2013

i decided to go for the ocz 600w fully modular power supply with 50amps on the 12v rails. i think thats more than sufficient for my system?

Feldmarschall · Sep 18, 2013

Enrique767 :

It is sufficient

Enrique767 · Sep 19, 2013

hi guys, it was the power supply all along now my pc works perfectly. thank you for your help :wahoo:

John Verdernshmits · Mar 1, 2015

jinayhvora :

OCZ is a Brand name, a pretty good one too. That PSU is rate 80+ Efficency so it's decent.

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