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[Radeon HD 6850 - 500w] PSU Computer turns off when gaming?

Last response: in Graphics & Displays
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June 30, 2012 4:37:12 PM

Hi everyone,

Yesterday I replaced my old nvidia graphics card with a Sapphire Radeon HD 6850, and installed it. The computer was quite dusty but was not sure how to dust it, as might create static so did not remove any dust yet. I installed the graphics card successfully and plugged in the 6 pin power connector and closed up. The computer booted up properly and the new graphics card was detected, and I installed the new drivers. Then when I tried to go into steam and boot up any game such as tf2, my computer turned off with no error message. This happens randomly, and the computer seems to be working fine when not playing games, but this is a massive problem as I bought the card to play better games. My CPU idles around 28-32C and the graphics card is around 45-50C so I do not think it is an overheat problem. While I only have a 500w PSU, this may be the problem while i thought it would be fine as it was the minimum requirement for the HD 6850.

Heres my specs:
MoBo: Gigabyte ga-880gm-usb3
Processor: AMD FX/Bulldozer 6100 6 Core
Graphics: Sapphire Radeon HD 6850 (newly installed)
16 GB GDDR3 Ram
Windows 7
500w Power Supply
1TB 7200 RPM HD

Is this is a PSU issue? A possibility is that I can buy a new PSU, while needs to be cheap as spent most most of my budget on the GPU and my new monitor.

Sorry if this is in the wrong section but I wasn't sure which one to put it in

Thanks everyone
June 30, 2012 5:41:11 PM

@OP the problem is in your psu, I can say this with a reasonable amt of confidence because your PC is not crashing when its idle and only seems to switch off gaming when the card needs the extra juice. The PSU is not able to meet the cards demands on load. Your SMPS is not of a reputable brand and dont trust the 500W label. GPUs need a good amount of amperage on the 12 V rail.
You will need to get a new PSU. Get the corsair cx430v2 in the least.
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June 30, 2012 5:46:31 PM

guru_urug said:
@OP the problem is in your psu, I can say this with a reasonable amt of confidence because your PC is not crashing when its idle and only seems to switch off gaming when the card needs the extra juice. The PSU is not able to meet the cards demands on load. Your SMPS is not of a reputable brand and dont trust the 500W label. GPUs need a good amount of amperage on the 12 V rail.
You will need to get a new PSU. Get the corsair cx430v2 in the least.


Hey thanks for the reply, i am on a budget, and not really wanting to pay more than £50 on a PSU right now as I have spent a lot on my new graphics card and monitor, can you suggest one that will work well with my set up?
June 30, 2012 6:00:11 PM

Quote:
http://www.aone.co.uk/ProdInfo.ASP?ProductID=3333
Here i found this-

+12v1 -14A
+12v2 -13A
WHICH ARE NOT SUFFICIENT FOR HD6850.

get a good psu like corsair GS600 OR Corsair cx500 OR Seasonic S12 II 620W with 5 year warranty
OR XFX Core edition 550 watts.
All above psu are very good and efficeint.


Hmm okay thanks, what are the sufficient requirements for the HD 6850?

Also will the CX500 manage to run it? As 500w is the miniumum for the HD 6850.

Will this be able to run it? http://www.ebuyer.com/159708-cit-750w-dual-12v-rail-12c...
June 30, 2012 6:34:40 PM

Quote:
CIT 750W IS ALSO CRAP

ITS SPECS-

12v1- 20a
12v2- 20a
dude as you can see in my signature, i am running hd6850 with corsair cx500.

just get psu from good companies like- antec,corsair,xfx,seasonic.

if you are planning to add another hd6850 for crossfire then get CORSAIR GS600.



Okay thanks! Will this run it? I might just pop into the store and pick one up quickly

http://www.pcworld.co.uk/gbuk/ocz-zs750w-uk-zx-series-a...
!