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chiv
Posts: 27530
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 Posted: Wed, 8th Feb 2012 18:35 Post subject: SLI causes computer shutdown. |
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SLI 570 gtx.
ok so heres the thing. i can be playing a game with sli enabled, and suddenly the thing just totally up and shuts down and then restarts.
thing is it always seems to happen at the same point in a game. if it happens during one type of scenario, it'll be perfectly stable until that scenario happens again. For instance, i played saints row the third perfectly fine, but during massive explosions close up, it would happen... massive gun fights or driving through heavy traffic or having loads of enemies or characters on screen, all perfectly stable. There was a mission late in the game where i had to drive a car into a petrol station. like clockwork, it would always happen the instant that explosion went off.
and now again in witcher 2, i can play the game fine during the training mission (and ive tried a bit of the prologue), but in the training mission, as soon as i initiate the first conversation with the wounded man, as soon as i see the guy during the conversation scene, a second later the shutdown happens - ALWAYS at the same bit.
i played mw3 all the way through without any problem, and i constantly play tf2 without problem, so whats the deal? ive tried installing new drivers, but the problem always continues to happen at the exact same part (or scenario) so is there any way it could still be a driver issue?
doing some reading online ive seen power being brought up most often as a cause of these kinds of things, but this is what i have:
http://www.pcpower.com/power-supply/turbo-cool-1kw-sr.html
so i cant see the problem being there?
its just strange that it always seems to happen at the exact same point every time, so i doubt its a heat issue? i mean i can play for an hour and then encounter the situation or i can play for half a minute and encounter the situation and the outcome is the same...
has anyone come across anything like this, or have any ideas on what the problem might be or how to fix it? heck, and idea how i can even go about locating where the problem is?
i spose i should also say that i have tested both these cards individually and encountered zero problems with crashes or shutdowns, and indeed if i turn off sli, i can play through any proper scenarios without issue.
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| Posted: Wed, 8th Feb 2012 20:02 Post subject: |
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Are you getting a BSOD and it's restarting, or you just get a restart? I assume you've turned off auto-restart upon BSOD.
If it's restart without any BSOD it's most definatly a power supply issue.
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Werelds
Special Little Man
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| Posted: Wed, 8th Feb 2012 20:03 Post subject: |
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I doubt it's the PSU in terms of power (gimme a sec), but just to make one thing clear: that is one hell of a piece of shit. It can only sustain just over 800W, which is just fucking aweful. To give you an idea of just how bad it is: take any random Seasonic-built 850W unit , and you'll be looking at a sustained throughput of 840-845W. Even the current Delta Electronics does about 835. What's even worse is that this thing is barely 80% efficient; at high loads that drops as well. Fortunately, that 800W should still be enough for your 570's + .. 2500K I think it was?
Why do I bash your PSU like this? Because those 2 factors combined (shit sustained throughput, crap efficiency) means that the parts inside are cheap. Given the low efficiency, that thing is going to run pretty hot. It might very well literally be riding its failsafe point in terms of temperature; you get a big explosion, GPUs need slightly more power for just a second and push the PSU above that point. It's not as much as overall temperature as just temperature at or near the sensor, so during prolonged use it'll still stay under the threshold just fine.
What's the ambient temperature like down there right now? Try leaving the side of your case off, put a big fan to blow towards the PSU and test again. I really wouldn't be surprised if it's just overheating 
Edit: Fuck that is disappointing. Didn't know PCP produced crap like that 
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| Posted: Wed, 8th Feb 2012 20:12 Post subject: |
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A *good* 850w supply should be able to handle two 570's in SLI.
But as you said, I doubt that thing can handle two 570's in SLI.
It's one of those older shitty PSU's where the real wattage was just lied about, and back in the day where one was expected to buy a '1kw' supply in order to make sure they were actually getting 700-800w in reality.
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| Posted: Wed, 8th Feb 2012 20:13 Post subject: |
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| Werelds wrote: | I doubt it's the PSU in terms of power (gimme a sec), but just to make one thing clear: that is one hell of a piece of shit. It can only sustain just over 800W, which is just fucking aweful. To give you an idea of just how bad it is: take any random Seasonic-built 850W unit , and you'll be looking at a sustained throughput of 840-845W. Even the current Delta Electronics does about 835. What's even worse is that this thing is barely 80% efficient; at high loads that drops as well. Fortunately, that 800W should still be enough for your 570's + .. 2500K I think it was?
Why do I bash your PSU like this? Because those 2 factors combined (shit sustained throughput, crap efficiency) means that the parts inside are cheap. Given the low efficiency, that thing is going to run pretty hot. It might very well literally be riding its failsafe point in terms of temperature; you get a big explosion, GPUs need slightly more power for just a second and push the PSU above that point. It's not as much as overall temperature as just temperature at or near the sensor, so during prolonged use it'll still stay under the threshold just fine.
What's the ambient temperature like down there right now? Try leaving the side of your case off, put a big fan to blow towards the PSU and test again. I really wouldn't be surprised if it's just overheating
Edit: Fuck that is disappointing. Didn't know PCP produced crap like that |
PCP&C went to shit when OCZ bought them. Way back in the days when 500 watts was considered to be massive and they were a smaller company they were good. Now, not so much.
Buy this Chiv and increase your e-peener status - http://www.newegg.com/Product/Product.aspx?Item=N82E16817151105
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Werelds
Special Little Man
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chiv
Posts: 27530
Location: Behind You...
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| Posted: Wed, 8th Feb 2012 20:45 Post subject: |
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brilliant, so my 1kw sli certified psu, cant handle these 2 cards, does that about sum it up? 
well that is a bit of a load 
but ill try blowing a shitload of air onto the cards and see if i can atleast eliminate overheating as a possible cause.
thanks guys.
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Werelds
Special Little Man
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| Posted: Thu, 9th Feb 2012 14:25 Post subject: |
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Sorry for asking a sidequestion, but I've always wondered if you can plug a card with 2 connectors to 1 PCI-E power cable on good PSU's?
I think I've seen some but I'm not that sure atm.
i5 6600k @ 4.3 GHz | MSI z170 Gaming M7 | 32GB Kingston HyperX Fury | 850 Evo 500GB | EVGA 1070 SC | Seasonic X-660 | CM Storm Stryker
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Sin317
Banned
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Location: Geneva
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| Posted: Thu, 9th Feb 2012 14:29 Post subject: |
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| difm wrote: | Sorry for asking a sidequestion, but I've always wondered if you can plug a card with 2 connectors to 1 PCI-E power cable on good PSU's?
I think I've seen some but I'm not that sure atm. |
well, it depends on the Amp i guess, if 1 rail has enough amp for both cards (otherwise, nope).
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jippyuk
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Location: Malta
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