PC turns off after 2 minutes of gaming!

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jtalboys

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Jun 20, 2015
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Hello my PC keeps shutting down after two minutes of gaming here is my setup:
Three Asus 24" 3D displays
Mars Gaming 700W Power Supply
2x Gigabyte GTX970 (In a two way SLI)
16GB HyperX Ram
AMD FX6300 CPU
MSI 970 Gaming Motherboard
One HDD
One SSD

Any help is much appreciated
 
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Supernova1138

Supernova1138

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Mar 22, 2011
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Well there are two main possibilities: 1. Your CPU or your graphics cards are overheating very quickly leading to shutdown, or 2. Your power supply can't deliver enough power to run 2 GTX 970s in SLI. I'm leaning towards the second one. Your power supply is made by Aerocool, who have a pretty poor reputation for PSUs. The specs on your PSU only give you 552 Watts on the +12 V rail, with the remainder being on the far less used 3.3V and +5V rails. In effect, you only have a 550 Watt power supply as far as a modern system is concerned, and while that's good enough for one GTX 970, you could very well run into problems with two.

You can try monitoring temperatures using something like HWMonitor to make sure you aren't overheating when you try to play. I'd start with removing one of the 970s and seeing if the problem persists, if it doesn't try running single card with the other 970. If both the cards work properly in single GPU mode, then that rule out a problem with the graphics cards and probably indicates that your power supply can't deliver enough power to run both cards at once.
 
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jtalboys

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Jun 20, 2015
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Thanks for the great reply! Could you by any chance recommend a power supply for my setup even if it is a bit costly! I will try the GPU's and get back to you but a recomendation on the PSU would be great as I could have one here by monday.
Thanks again
 
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Supernova1138

Supernova1138

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Mar 22, 2011
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You'd probably want a good quality 750 Watt power supply for SLI, though the GTX 970s are pretty power efficient for the performance they have and you could potentially get away with a good 650 Watt PSU. Seasonic, Corsair (TX, HX or AX series), XFX, EVGA, and Antec are among the better brands. Most of those will be a bit pricey, as good quality 750 Watt PSUs are usually priced around $90 US or higher. If you see a power supply claiming 750 Watts selling for $50 or less, then it is almost certainly a piece of crap that won't be able to deliver what it promises.
 
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jtalboys

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Jun 20, 2015
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Okay, I paid about 50 for mine but I am willing to pay that price for a good one... on the other side is there any chance my three screens could be causing it? Because when I go to try the GPU's on their own now I will only have one screen plugged in so I wont know if it is my screens or the PSU. Any idea? Is it very unlikely to be the fact im running three monitors?
Thanks again
 
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Supernova1138

Supernova1138

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The screens aren't going to make a difference in this case, as they all have their own separate power sources. Now rendering a game across three screens will put more load on your GPUs and get them to draw more power. However, your system should be able to run properly even with both GPUs going at 100%, so if you're having problems gaming across three screens but it goes away with only 1 screen due to your GPUs not working quite as hard, that is still indicative of your power supply not being able to provide enough power for your graphics cards.
 
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jtalboys

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Jun 20, 2015
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Great youre a star! Ive found a corsair power supply and I will order it and ill mark this as best answer. Just have one question left... is there any chance the CPU , cooling or RAM could cause this problem?

Thank you
 
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Supernova1138

Supernova1138

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Mar 22, 2011
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Those are possibilities, though you'll have to do some more troubleshooting if you want to explore them. For temperatures, run HWmonitor in the background and keep an eye on your temps while gaming, throw it onto a monitor you are not using for the game. If your GPU temp are shooting up to 95+ Celsius or your CPU temperature is exceeding 65 Celsius, then you have an overheating issue. If you have your FX 6300 overclocked, remove the overclock and see if the problem goes away. If it does, then your overclock was unstable and you're going to need to add more voltage or dial back your overclock a bit to get stability. RAM you can test by usimg Memtest86, but it is a somewhat time consuming process, and RAM problems often manifest themselves with things like freezes, bluescreen errors and the like rather than just shutting off the system.
 
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jtalboys

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Jun 20, 2015
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Okay I will try all the things you have said... last thing... when it turns off it wont turn back on unless i flick the switch on the back of the PSU off and then on again, is that normal or does that mean its a faulty PSU?
 
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jtalboys

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Jun 20, 2015
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Okay i am new to the forum I have selected this as best answer... I dont know if that helps you in any way but I hope it does as I was lost and thank you so much
 
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