Computer 'resets' when playing graphically intense games.

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72martin0

Honorable
Nov 8, 2013
8
0
10,510
Hey guys, I'm looking for a bit of advice here.

I recently added a second GTX660 to my PC and while I was at it, I added a new motherboard. I installed Win7 Ultimate and all my games and so on and it's working fine. However, when I play graphically intensive games such as Assassins Creed 3 and Battlefield 4 for more than a few minutes my PC resets as if somebody pulled the plug. I've tried SLI with Castlevania - Lords of Shadow and it didn't cut out at all with settings maxed out, so I'm assuming it's going to be a performance issue. Both Battlefield and Assassins Creed work when SLI is disabled. Does this sound like a PSU issue? Or heat? or perhaps something else? Specs here:

AsRock Z77 Extreme 4
Corsair CMX8GX3M2A1333C9 XMS3 8GB
i5 3550 Ivy Bridge CPU
Corsair CX 750W PSU
Asus Geforce GTX 660
KFA GTX 660 (SLI)
Windows 7 Ultimate (x64)

Any help/opinions would be appreciated! Thanks in advance!
 
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getochkn

getochkn

Polypheme
Jul 2, 2006
12,407
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65,040
could be heat, are you checking temps of cpu and both gpu's while playing?

Also could be the dodgy named KFA video card that you added for your second card. Always best if possible to use the same video cards for sli/crossfire. I've never heard of KFA.
 
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iam2thecrowe

iam2thecrowe

Glorious
Jul 4, 2010
10,591
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44,965
sounds like a psu issue most likely. Get HWmonitor and monitor the temps under load, see if either the cpu or gpu(s) are overheating. Ivy bridge and haswell i5's are prone to overheating on the stock cooler, especially if there is minimal airflow in the case, and if you have turned off thermal throttling in the motherboard bios. It would also be a good idea to do things like, update motherboard BIOS, clean install nvidia drivers, check your windows error logs for any nvidia or game related errors, run memtest, run your manufacturers HDD test utility etc. to rule out as many possibilities as you can before you start throwing new parts at it.
 
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7

72martin0

Honorable
Nov 8, 2013
8
0
10,510


I'll give them all a bash just now. I've just switched the cards and made sure everything's connected there (you never know). I thought it might be a PSU problem, but the PSU is relatively new and my other build which is similar with the exception of the 660's being 670's works absolutely fine. The only major difference aside from the cards is a corsair h55 watercooler on the CPU. So could the CPU be a factor?
 
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C12Friedman

C12Friedman

Glorious
Jan 25, 2012
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I'll point my finger at the PSU regardless, the builder series is Corsair's entry level PSU and not too, too long ago, there seemed to be an issue with the quality of some of the components that made their way into those units - it may be that yours is one of those. I'm going to say about a year ago, I saw (what I consider) a high amount of complaints about the CX series but after a period of about a month (less probably) they seemed to stop (I attributed the influx to a bad batch of some part in there).
I recall that simply because Corsair is a quality brand of PSU and the complaints I was seeing (mostly CX units) had me wondering what was going on...
 
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7

72martin0

Honorable
Nov 8, 2013
8
0
10,510


Yeah, I've been running speedfan and all the temperatures are fine, even when playing games so the PSU is seeming like the most likely cause. I'm just trying to nail the problem down before going out and splashing out on new hardware.
 
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C12Friedman

C12Friedman

Glorious
Jan 25, 2012
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The bad of that is... if it is the PSU, it can cause all kinds of issues (not directly related to the PSU) which can make troubleshooting rather difficult. I'm thinking you are still under warranty with that PSU, hopefully. I'd go ahead and RMA it (Corsair is supposed to be really good about that) - if you find the issues are still there at least you've eliminated the PSU as suspect.
 
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