Computer turning itself off

[CalebTheEternal]

The last few weeks my computer has been turning itself off without warning, it didn't do it often at first, but now it's doing it almost every day; it doesn't say shutting down or anything, the screen just goes black and the fans on my computer turn off. My LEDs on my motherboard stay on so I'm thinking that it's not a PSU problem. None of my parts are overclocked and my temps are fine. I've only noticed it when I'm on CSGO, but then again that's all I do when I'm on my computer. All of my drivers are up to date as well. 

 

 

Case: NZXT H440

Motherboard: Asus Maximus Hero VII

CPU: i7 - 4790K

CPU Cooler - Corsair H100i Liquid Cooling

GPU: 2x Evga GTX 970

Ram: Mixed 32 GB (16Gb GSkillz Ripjaw - 16Gb Dell Crap)

HDD: 2 Tb

SSD: 4x 250 GB (2x Samsung 840 Evo - 2x PNY)

 

 

[Guest]

Could be a bad PSU or your mixed RAM.  

[CalebTheEternal]

Could be a bad PSU or your mixed RAM.  

I've had the ram for about 8 months now, mixed, so would it be possible that it just starts doing that now?

[Aniallation]

I've had the ram for about 8 months now, mixed, so would it be possible that it just starts doing that now?

Possibly, I've had RAM suddenly go bad after months of usage as well. 

[Naeaes]

I've had the ram for about 8 months now, mixed, so would it be possible that it just starts doing that now?

 

Things change over time as parts "wear". I'm not saying it's likely but one stick could be fine with 1.50V and the other could start needing something closer to 1.55V and communication between them being off, things just go wrong when one calls for lower voltage. Who knows with these things.

 

Since it goes down so suddenly, it's got to be related to either power or temperatures. Everything else is not critical enough to skip warnings. My guess is a bad PSU.

[CalebTheEternal]

Things change over time as parts "wear". I'm not saying it's likely but one stick could be fine with 1.50V and the other could start needing something closer to 1.55V and communication between them being off, things just go wrong when one calls for lower voltage. Who knows with these things.

 

Since it goes down so suddenly, it's got to be related to either power or temperatures. Everything else is not critical enough to skip warnings. My guess is a bad PSU.

Ok, I would say that too since my temps are fine. I'll just buy a new PSU I guess!

[Naeaes]

Ok, I would say that too since my temps are fine. I'll just buy a new PSU I guess!

 

If you want to look into it more, there's a voltage monitor in Asus BIOS that could give a hint if there's fluctuation or deviation in the voltages. But it's not under load so it can definitely seem fine. I can't remember if there's a voltage monitor in the asus OC suite but there is one in HWMonitor http://www.cpuid.com/news/39-hwmonitor-1-28.html If I remember correctly it can even be set to log to a text file. So when your computer crashes, you could reboot and go back to see what the voltages were at the last second it was still on. 10% deviation from nominal is still within range but a volt or two off is usually a dead giveaway.