PC keeps randomly shutting down, at random times.

lameskydiver · Jul 31, 2015

So currently I have a year old PC, and I think from start of this year my PC would just randomly shut down without any notices. It will shut down like everyday, and when it's worse it literally shuts down right after it loads into OS.

Yes, I did try to search on the Internet for solution, but so far it has done no help to the problem. I even posted some posts on reddit and stuff, but since most of the time I have recieved no replies, I have decided to post one here.

Here is what I have tried to do so far

■ Adding fans. Craptons of fans and aftermarket CPU cooler incase temperature was the issue.
■ Removing the case cover
■ Running the Memtest+84
■ Reapplying the CPU thermal paste
■ Reinstalling the OS (Win7)
■ Upgrading to Win10 (Still waiting if helped or not)

I tried to run both modes in the memtest+84 (fail-safe and multi threading) and the fail-safe mode ran fine without any errors, but when doing multi threading mode it runs fine until test #7 and it says [Blocked move] or something like that, and the test just stops there. Not sure what this really means though.

I have also went to log eventer and found kernel 41 error which I found out it usually is the problem with RAM or PSU or software problems (or anything actually).

Here is the spec of by PC btw:
CPU - Intel i5 4590
Mobo - Asrock Z97 Pro4
GPU - Gigabyte GTX 770 2gb
RAM - Corsair Vengeance LP 16GB
PSU - EVGA Supernova NEX750G 750W
SSD - PNY XLR8 120GB
HDD - WD Blue 1 TB
OS - Windows 7 ([strike]Premium[/strike] Ultimate) x64

Also, someone in the other forums mentioned that the PSU has been proven to be inefficient, and might be the cause of the problem.

If I can't solve the problem in this forum as well, that I am going to probably buy fresh new PSU and RAM just to be safe.

I really appreciate any answers you give to me. Thanks in advance.

EDIT: I am going to upgrade to Windows 10, and see if that possibly can fix the issue.
EDIT 2: Done installing, installed fresh new drivers compatible to Win10, and PC haven't crashed after update. Will see more tomorrow.

FINAL EDIT: Fixed the issue... it was my MoBo power cable wasn't properly plugged in. If you're having the same issue I really recommend checking the cabling as soon as it occurs. It could be an issue with something else, but don't be a moron like me and just make sure everything is secure.

Mattios · Jul 31, 2015

Does it just cut out instantly, or show 'shutting down...', or blue screen?

lameskydiver · Jul 31, 2015

Mattios :

It just shuts down without any shutting down screen, or any blue screen.

Mattios · Jul 31, 2015

Check the basics. Is the plug firmly in the back of the PSU? Is the plug firmly in the mains socket? Is there a chance you're accidentally knocking the power cord with your feet which causes it to disconnect briefly?

lameskydiver · Jul 31, 2015

Mattios :

Just checked the power socket, and it is in place. There is no possible way for me to knock off the socket, as my PC is on the table, and the power line goes away from me.

Mattios · Jul 31, 2015

The OS is unlikely to crash in such a way that no error screen comes up, so I'm looking at hardware. Download http://piriform.com/speccy and monitor temperatures of the CPU and GPU at idle and load.

lameskydiver · Jul 31, 2015

Mattios :

Well, I'm more like installing Windows 10 because I feel like it, and kind of hoped it will magically fix the problem

. Still installing so don't know the result, but most likely not as you said. I'll try the program after I install it.

Mattios · Jul 31, 2015

I didn't mean to attack your choice to download Windows 10. It is a good OS!

Honey_Badger · Jul 31, 2015

So does it literally just shut down, or does the display go and the system runs a bit longer?

lameskydiver · Jul 31, 2015

Mattios :

Didn't feel offended don't worry

EDIT: Realized my choice of wording went weird in the previous post oops.

lameskydiver · Jul 31, 2015

Honey_Badger :

Everything just shuts down, that includes the display and the system.

samurai221 · Jul 31, 2015

is the power supply fan working properly?

lameskydiver · Jul 31, 2015

samurai221 :

I'll have a look at that tomorrow since it's dark right now where I live.

ko888 · Jul 31, 2015

The discontinued EVGA Supernova NEX750G 750W, taht was made by FSP, wasn't considered to be a good PSU. It's an old group regulated design with its inherent drawbacks. The PSU's +5V rail actually drops out of spec during official Intel Haswell compatibility testing.

The EVGA SuperNOVA 750 G2 (220-G2-0750-XR) is the one to get. It's made by Super Flower and is based on a modern DC-to-DC circuit design that is definitely Intel Haswell compatible. It is substantially better than your EVGA Supernova NEX750G.

lameskydiver · Jul 31, 2015

ko888 :

The only reason I bought this without specifically researching furthermore was because it was on sale when I was buying parts :/. Guess that's a lesson learnt.

If the problem consists, I might consider getting new PSU for the build. What would be the best PSU for my build, and considered reliable?

ko888 · Jul 31, 2015

lameskydiver :

ko888 :

The only reason I bought this without specifically researching furthermore was because it was on sale when I was buying parts :/. Guess that's a lesson learnt.

If the problem consists, I might consider getting new PSU for the build. What would be the best PSU for my build, and considered reliable?

The EVGA SuperNOVA 750 G2 (220-G2-0750-XR) is one of the best 750W PSUs currently available on the market.

lameskydiver · Jul 31, 2015

ko888 :

lameskydiver :

The EVGA SuperNOVA 750 G2 (220-G2-0750-XR) is one of the best 750W PSUs currently available on the market.

God damm, now I'm more regretful about my decision. I'm just going to do more researches before I buy a new one, and replacing the PSU will (hopefully) fix the issue.

Honey_Badger · Aug 1, 2015

I had a similar problem, not identical. My GPU wasn't plugged in fully to the PCIE lane, maybe check that?
Also, go through your instruction manuals perhaps and check that you have plugged in all the wires..etc...

Sorry, but GOOD LUCK!

lameskydiver · Aug 1, 2015

Honey_Badger :

I remember when I was checking my PC long before the cable to GPU wasn't properly connected so I did plugged them correctly and now it shouldn't be the issue, but who knows? I'm gonna go through cables as you suggested and I really do hope I find the issue.

... and why should you be sorry?

Thanks for the support though.

Vic 40 · Aug 2, 2015

Can you try with another psu? Maybe from a friend or ... I would look at that first too.

When considering another psu does it have to be 750watt? You want sli maybe?

lameskydiver · Aug 2, 2015

Vic 40 :

Well, all my friends are off to vacation, and I don't have a spare PSU so that is not an option.

And about the PSU, I don't really need 750W, but I have in just in case I might add more parts to the PC. Might consider sli, but that will be in distant future. And at the time I was looking for the PSU the price was same as 650W, so I thought why not and bought the 750W one.

lameskydiver · Aug 4, 2015

Honey_Badger :

I didn't had time to really check my PC because I was kind of busy for last few days. But today, I checked through all the cabling and testing if the RAM or the PSU has failed or not. Surprisingly (and thankfully), it wasn't neither PSU or the RAM that was causing the issue. In fact, I managed to become a moron when I was building the PC, and didn't properly connect the power cable that goes to the MoBo. Similar to how you solved it actually.

I'm still waiting to see if that was the case, but I hope it actually is. I guess another lesson learnt from here is don't be a moron.

Vic 40 · Aug 5, 2015

Don't be so hard on yourself,it happens.

lameskydiver · Aug 5, 2015

Vic 40 :

Hope it doesn't happens in the future

Vic 40 · Aug 6, 2015

When you make this mistake again can you call yourself a moron.

PC keeps randomly shutting down, at random times.

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