PC shuts down 'randomly' - I can't find the cause.

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safian

safian

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Dec 28, 2013
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Hey guys. I really need help with my PC.

My candidates for source of a problem: PSU or RAM (maybe GPU?).

This build has been working for almost 1 month now, but today something happened.
After playing Battlefield 4 for few hours my computer just shut down, then restarted twice shortly after powering up and finally booted. I was sure that somehow I kicked the cables without knowing and that was the reason so I started the game again and it happened again after few minutes.
Then it didn't boot but returned information that stated something like "OC parameters could not be applied, please go to setup...".
I was using "ASUS optimal" settings from BIOS, that was runing my CPU at 4.3 GHz, and RAM XMP at 1600Mhz.

I decided to set system performance back to "Normal" and try. After launching the game it shut down again after few seconds. Then I booted again and computer shoot down while I was browsing internet for explanation.

After that I disabled XMP and tried to play BF again. I was playing for good 20 minutes before it shut down again, looking on temperatures and voltage on the other screen.
CPU didn't go over 55*C,
GPU didn't go over 70*C,
12V voltage was varying between 11.9V to 12.09V,
All fans were spinning fine.

After that shutdown it didn't want to start, kept powering and restarting all the time. I had to turn of the PSU and turn it on after a while, but it didn't want to start. Finally it powered and now I'm writing this post.

It didn't shut down for good 30 minutes now.
I don't have another PSU or another PC to check the components.

Build:
i7-4770k with Macho HR-02
Asus Z87-A
Gigabyte GTX 780 OC
Kingston Limited Edition NaVi HyperX 16GB (2x8GB) 1600MHz Dual Channel
Seasonic X-Series 750W
Windows 7 64bit

Sorry if my message is too long, but I wanted to give you all information I have so you don't have to ask.

Edit:
After posting this my PC shut down again while browsing internet, then restarted 4 times before launching.
 
Solution
DonQuixoteMC


What motherboard/RAM do you have?

I would just use your computer for a day with only one RAM stick and wait to see what happens. It seems unlikely that they are the source of issue since you didn't run into any errors with memtest. However, that may just mean that the sticks themselves are fine, but may be incompatible with your setup. It's hard to tell.

You're taking the right approach to this though, not jumping to conclusions and checking every option. I'd just say test the RAM issue a little more before moving on...
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DonQuixoteMC

DonQuixoteMC

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Try narrowing down the source of the problem. Have you tried booting with one RAM stick or the other? Swapping out the PSU (If you have that option)? Booting without the GPU (just using the integrated GPU)? When you say you "set the system back to normal" do you mean that set the CPU and GPU core clocks back to factory defaults? If not, do that as well.

Also make sure that all the connections are tight.

I really can't think of much else to do except try different combinations of hardware. It sounds like you've tested all the obvious causes. I would have sworn that your problem was caused by too little power, overheating, or a bad overclock, but your tests seem to disprove those theories.

Let me know if swapping out hardware fixes anything. For what it's worth, you might also want to try resetting CMOS on your motherboard.

And never apologize for long, on topic posts! Those extra details are always helpful. It helps avoid extraneous questioning :p

Best of luck!

DonQuixoteMC
 
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DonQuixoteMC

DonQuixoteMC

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Ah, okay. So it does change the core clocks. Thanks!

Yeah, and if none of that works, try resetting CMOS (sometimes it's magical :p)
 
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safian

safian

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Dec 28, 2013
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After removing one RAM sitck I've been playing BF4 for 50 minutes without shutdown.
Does it mean that the RAM is broken or it's not enought to draw that conclusion? What should be my next move? Swaping RAM stick and trying to run on the other one?
I'll keep the CMOS reset in mind.
 
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safian

safian

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Dec 28, 2013
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I checked both sticks separately with memtest86+ - no errors. Then I checked them tegether with XMP enabled - no errors.
Now I'll try to run some benchmarks and Battlefield 4 to check if the problem still ocurs.
 
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DonQuixoteMC

DonQuixoteMC

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What motherboard/RAM do you have?

I would just use your computer for a day with only one RAM stick and wait to see what happens. It seems unlikely that they are the source of issue since you didn't run into any errors with memtest. However, that may just mean that the sticks themselves are fine, but may be incompatible with your setup. It's hard to tell.

You're taking the right approach to this though, not jumping to conclusions and checking every option. I'd just say test the RAM issue a little more before moving on. (When I say test, I mean use your computer for extended periods of time with only one RAM stick)

Best of luck!

I hope you find a solution soon.

DonQuixoteMC
 
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Solution
safian

safian

Honorable
Dec 28, 2013
14
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10,510

Yes, I've changed both RAM sticks and the problem is solved. Good luck with your PC!
 
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