PC reboots while playing graphically intense games

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tango232

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Jun 15, 2016
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I recently bought this pc https://www.amazon.com/CyberpowerPC-Gamer-GUA3100A-Gaming-Desktop/dp/B0111MTSZ8/ref=sr_1_1?ie=UTF8&qid=1466014876&sr=8-1&keywords=cyberpowerpc+gua3100a and I added a gtx 950.

Well I ended up needing to buy this adapter http://www.microcenter.com/product/409236/8_Dual_4-Pin_to_6-Pin_PCI_Express_Extension_Power_Cable since my PSU didn't have a 6 pin connector, now when I play games like squad, 7days to die, and sometimes red orchestra 2, my pc will reboot after 5-10mins of playing, I'm not pc savvy at all and its driving me crazy, thanks in advanced for the help.

PS. Just did a stress test with Valley and it rebooted right when I walked away, so I didn't get to see the GPU temp before crash, but it wasn't going higher than 80 C when I was watching it.
 
Solution
Barty1884
Generally speaking, if a PSU does not natively provide the relevant cables, you should replace with a PSU that does.
Your adapter there takes 2x molex and 'converts' them to a 6pin PCIe connector.

Ultimately, some PSUs are better than others. Some provide adequate power to their molex connectors and a converter cable will work reliably. Some other PSUs hover between "barely adequate" and "utter junk".

If there were a decent quality PSU (that the connect should work from), I would expect to see it listed in the spec for the rig. As it's not commented on at all, it's (fairly) safe to assume it's in the latter category.

Your current PSU can provide power to your GPU via that connector, but not enough or reliably. While your rig is...
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Barty1884

Barty1884

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Generally speaking, if a PSU does not natively provide the relevant cables, you should replace with a PSU that does.
Your adapter there takes 2x molex and 'converts' them to a 6pin PCIe connector.

Ultimately, some PSUs are better than others. Some provide adequate power to their molex connectors and a converter cable will work reliably. Some other PSUs hover between "barely adequate" and "utter junk".

If there were a decent quality PSU (that the connect should work from), I would expect to see it listed in the spec for the rig. As it's not commented on at all, it's (fairly) safe to assume it's in the latter category.

Your current PSU can provide power to your GPU via that connector, but not enough or reliably. While your rig is not doing a whole bunch, your GPU isn't looking for much power. When it 'ramps up', it's looking for more than your PSU can provide.

Ultimately, your best option here is to replace the PSU with something designed to run a GPU and that natively provides at 6pin PCIe cable for you to use.

Your rig likely needs somewhere in the 250W range at absolute max draw. Allowing a bit of 'headroom', a quality 400-450W would be more than sufficient. (realistically, a quality 300-350W would probably do just fine)

This is a decent quality PSU, has the necessary connectors, will run your rig as intended & doesn't break the bank:
https://pcpartpicker.com/product/HvTmP6/evga-power-supply-100w10430kr

It's not the best PSU in it's capacity range, but it's more than capable of running this setup.

If you wanted a true 'great quality' PSU, the SeaSonic S12II 430W would be ideal & last longer:
https://pcpartpicker.com/product/4Vzv6h/seasonic-power-supply-s12ii430b

But, if you were going to spend the ~$50, assuming you're ok with rebates, the EVGA SuperNOVA B2 750W is a steal at $49 after rebates: https://pcpartpicker.com/product/JYyFf7/evga-power-supply-110b20750vr

It's ridiculously more than you need power-wise (and more than you're ever likely to need, realistically) but for the price, it's a bargain!
 
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Solution
Barty1884

Barty1884

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Apr 16, 2015
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While this is valid, even the $20 EVGA PSU I linked would power the 950 properly.

Considering the OP upgraded to the 950, it would be underwhelming to have to underclock/volt the GPU just to have it run - at that point they're likely not much better off than the R7 240 that came with it.
 
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tango232

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when I get a new PSU, will it have the 4 pin molex connectors and 1 6 pin? since it seems everything is connected with the 4 pins, seems like a pain in the A to do this
 
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MatthewGB

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The PSU will almost definitely come with molex connectors, usually about 4 of them. It has been a standard for a long time and should come with it. The ones suggested above have molex connectors.
 
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