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PC shuts off randomly

2K views 46 replies 12 participants last post by  XEONIC 
#1 ·
Hey Guys!
I have no idea, if this is the right forum to post this, but i'll try anyway!

First off, here's the specs for my build:

Motherboard: P9x79 Pro
CPU: i7-3820
GPU: Geforce gtx780 ti
PSU: Corsair CX750
RAM: 32GB G. skill Z 1600
Cooling: Corsair H100i

HDD's:
1 x SanDisk 128GB SSD
1 x 1.5TB Samsung 7200RPM
2 x 2TB Samsung 7200RPM
2 x 2TB Seagate 7200RPM

I have a LOT of trouble with this build.
The system suddenly goes to black screen, and it seems like the PC is still running. But I have to restart it, to get it to work again.
Sometimes it just shuts down completely, without any warning. And last, but not least, sometimes it shuts off the screen and the fans goes to 100%!

I am not a overclocking expert (not one bit unfortunately), so I have just gone to BIOS and set it to optimized default (I do have the latest BIOS)

I have RMA'ed the RAM (Went from Corsair Vengence 32GB 1866, to the G. Skill, after reading that the G. Skill are much better, for the P9x79 Pro).
I have RMA'ed the GPU (Went from gtx 680+ 4GB, to the gtx 780 ti, after I got it tested by a local PC store, who was sure it was the GPU).
I also changed the cooling from Arctic cooling freezer i30 to yhe H100i.

So now there's only the CPU, PSU and MB left to RMA! :/

I have tried (with my VERY little OC knowledge) to fiddle around with some settings in the BIOS, but nothing have worked so far.

I REALLY hope you guys can help me out here
smile.gif


Kind regards
Sebastian
 
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#2 ·
Welcome to OCN

Sounds like something is overheating

Or you PSU is broken
 
#3 ·
^ agreed.

Try re-seating your cooler on the CPU and make sure it's making complete contact - easy to tell because the thermal paste will show where contact was made when you remove it.
 
#4 ·
Also make sure that the pump is actually on
 
#6 ·
Quote:
Originally Posted by BrainstormCM View Post

Thx for some fast replies!

I don't think it's the cooling, because my temps are at around 30C, and even tried a prime95 test, and it got to max 57C
smile.gif

But is my PSU too light for this system?
Its way overkill

Its just not a great PSU you have

You picked quantity and not quality
 
#7 ·
Quote:
Originally Posted by BrainstormCM View Post

Thx for some fast replies!

I don't think it's the cooling, because my temps are at around 30C, and even tried a prime95 test, and it got to max 57C
smile.gif

But is my PSU too light for this system?
A good 750W PSU is enough to handle your system although you do have a lot of HDD's. It's a corsair so its a good quality PSU... but I would highly recommend your next step to try a different PSU as your temps are great and it's unlikely thermal shutdown.
 
#8 ·
Sometimes the best solution in cases like this is to start from scratch. I would tear th whole system down and rebuild it to a bare minimum. One set or ram, only the ssd and even try just your on board video to start with. Make sure your bios settings are all correct. If you can become stable with that then slowly add components starting with your GPU then your extra ram sticks. You may have just forgot to do something so minor you'll smack yourself.

Also: Make sure all of your case connections are done properly like the USB cables plugged into the correct slots.
 
#10 ·
Rosewill Capstones are inexpensive and often on sale and are made by Seasonic, which is a top OEM.
 
#11 ·
Quote:
Originally Posted by flamin9_t00l View Post

A good 750W PSU is enough to handle your system although you do have a lot of HDD's. It's a corsair so its a good quality PSU
This is wrong on so many levels

Corsair does not make PSU´s or is the CX line very good

Due note that the CX750 is a downgraded TX750 so its not as bad as the rest of the CX series
Quote:
Originally Posted by FastMHz View Post

Rosewill Capstones are inexpensive and often on sale and are made by Seasonic, which is a top OEM.
Capstone are not made by Seasonic

The Capstone is a Super Flower Golden Green
 
#12 ·
Oops, my bad! Still a top OEM though
smile.gif
 
#13 ·
Quote:
Originally Posted by FastMHz View Post

Oops, my bad! Still a top OEM though
smile.gif
They like every other OEM has both good and bad stuff

i really dont like it when words like top and best OEM is thrown around

It also depends what they are paid to make

So even Seasonic can make crap if that is what they are asked to make

Like that Antec series i can never recall the name of
 
#18 ·
Unless you have two video cards or have one overvolted 750 watts is way more then needed
 
#19 ·
70% chance its the PSU, 30% chance something is overheating.

To check temps and voltages: HWINFO64 or 32 (depending on the SO).
If temps during NORMAl use are above 50-60 there's something wrong. If voltage in the +12v line goes below 11.8v during normal use or gaming, its the PSU (also check the +3v and +5v line)

 
#20 ·
Quote:
Originally Posted by pokerapar88 View Post

70% chance its the PSU, 30% chance something is overheating.

To check temps and voltages: HWINFO64 or 32 (depending on the SO).
If temps during NORMAl use are above 50-60 there's something wrong. If voltage in the 12v+ line goes below 11.8v during normal use or gaming, its the PSU (also check the 3v and 5v line)
Software is useless for checking your PSU
 
#22 ·
Quote:
Originally Posted by shilka View Post

Software is useless for checking your PSU
It won't corroborate if it is faulty but at least it will show if its not delivering enough power or if the current isn't stable (it will just give the indication). Still you are correct, you would need a multimeter to correctly check a PSU.
 
#23 ·
Quote:
Originally Posted by BrainstormCM View Post

I only have one gtx780 ti, but I want to have the oppotunity to upgrade.
If software is useless, then how would you check if everything is OK with the PSU?
Digtal multi meter is the only real way of telling if your PSU is acting up
 
#25 ·
Where are you from?
 
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