Elliot B. Posted April 17, 2014 Share Posted April 17, 2014 I bought a second 7870 XT so I needed a new PSU. I bought an EVGA Supernova NEX 750W. The PC randomly dies during games and when benchmarking and doesn't turn back on for around 5 minutes (no matter how many times I press the power button). When I press the power button after it dies, things come on for a quarter of a second before dying again. Any ideas? All temperatures are fine. My 3570K was overclocked to 4.6 GHz by my motherboard but I've disabled that for now for obvious reasons. Link to comment Share on other sites More sharing options...
xendrome Posted April 17, 2014 Share Posted April 17, 2014 Power Supply has 61amps total on the 12V rails, so it should be fine for that setup even with the overclock. Do you have a kill-a-watt meter that you can check the total watt draw under load with the overclock and dual GPUs? Could be a bad power supply, maybe one of the 12v's in borked. Link to comment Share on other sites More sharing options...
ShadowMajestic Posted April 17, 2014 Share Posted April 17, 2014 Sounds like something is overheating. T3X4S 1 Share Link to comment Share on other sites More sharing options...
snaphat (Myles Landwehr) Member Posted April 17, 2014 Member Share Posted April 17, 2014 If you pull the power plug and plug it back in after it dies, do you get the same behavior? Link to comment Share on other sites More sharing options...
JJ_ Posted April 17, 2014 Share Posted April 17, 2014 Sounds like a bad PSU. My XFX PSU did the same minus the part of randomly shutting down. I replaced it with an Corsair AX860 (there's also the AX760 in the same range), it's never missed a beat since. Link to comment Share on other sites More sharing options...
Aergan Posted April 17, 2014 Share Posted April 17, 2014 I'd say the new PSU is overheating (assuming previous overclock was stable with headroom) or possibly even overloaded on one of the rails. Does your board's firmware include the Intel ME / SM Bios event logging? You can try enabling that for more information as to what's going on with power states / thermal control / speed down. Link to comment Share on other sites More sharing options...
Skyfrog Posted April 17, 2014 Share Posted April 17, 2014 Do you have another power supply you can test it with? As others have said it does sound like something is getting stressed and maybe overheating. Link to comment Share on other sites More sharing options...
compl3x Posted April 18, 2014 Share Posted April 18, 2014 Sounds like a bad PSU. Don't discount the PSU being the problem just because it is new. T3X4S 1 Share Link to comment Share on other sites More sharing options...
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