PC randomly turns off!

Domg13 · Apr 10, 2014

Hello! I recently purchased a new graphics card, A EVGA GTX 780 Ti and ever since i installed it 3 times now while playing videos games, typically Diablo 3 my computer will just shut itself off and i don't know why! Its very frustrating. I've taken apart my whole computer and cleaned everything out and re-plugged it back in. When I thought that did the trick, apparently it didn't. My PC setup before my new card is an AsRock Z77 extreme 4 mobo, with an intel I7 3770k, EVGA 750w NEXB, AMD 7870 Crossfire, with my Antec 1200 full size tower is that means anything. I uninstalled all of my AMD drivers and installed the new ones from GeForce. Ive never had any problems with my 7870 crossfire as far as my computer turning off at random times? Im very confused why this is happening the only other thing i can think of is my power supply?? But ive read online a 650W can supply a 780ti no problems? If anyone could help me out i'd be very appreciative! Thanks!

kapitalistas · Apr 10, 2014

it can be heat related problem.may helps check fan speed for cpu and the temperatures.

jay_curtis36 · Apr 10, 2014

Have you checked your computers temperatures? That might be causing it. Try HWMonitor by CPUID. It's very useful.

jay_curtis36 · Apr 10, 2014

@kapitalistas Lol we posted at the exact same time.

Domg13 · Apr 10, 2014

I always have my monitors running. My CPU gets around 50C and my GPU will run around 65-75 which seems normal to me. I'll start playing now and see what happens. I'm also running 2 screens as well if that helps out. Also I just want to clarify that when my PC shuts off it doesn't power down through windows its like plug pulling it.

Domg13 · Apr 10, 2014

Okay my GPU temperature got up to 75C and my fan speed got up to 2000 RPM. My cores were running at about 40-50C.

Domg13 · Apr 10, 2014

Something i should have noticed too is that when I start playing a same my GPU (Or at least I think it is) starts making a buzzing noise which i've never heard because of my headset. Is that because the fan speed is to high?

Domg13 · Apr 10, 2014

I'm pretty sure my temperatures are fine from what I understand. I'm not sure if my RPM on my GPU is going to high? This is a superclocked model of the 780ti. I was scanning through GPU-Z and it showed my Max power consumption through my card was 99%. I really have no clue on what to do at this point. I know this is going to continue to happen if I don't find a solution? Do you think that this could be a software problem? The only thing that really comes to mind is my power supply, but I honestly have no idea.

J_E_D_70 · Apr 10, 2014

That should be a quality PSU but any of them, regardless of brand, can have bad units. Can use a program like OCCT (probably CPU-Z?) to check your voltages - specifically the 12V rail. You can also use OCCT to put a load on just the CPU, just the GPU, or the PSU to see if you can recreate the problem and narrow it down.

Domg13 · Apr 10, 2014

Okay I downloaded OCCT. I'm not sure if I did this correct I went under power supply and ran the test or "Burn Mode" It was monitoring 26 sensors. These are the numbers I took down. (CPU VCORE: 1.05V) (VIN1: 1.83V) (AVCC: 3.37V) (3VCC: 3.36V) (VIN4: 0.91V) (VIN5: 1.71V) (VIN6: 0.82V) (VIN0: 0.88V). Im not sure if this is the 12V rail but when I added those all up it was just around 13.84V. Is this what you were talking about?

Domg13 · Apr 10, 2014

I just finished a 1 hour of a power supply test through OCCT but i'm not to sure what i'm looking for. I don't want to run games on my PC because I don't want my system to keep shutting itself off the wrong way. Could anyone help me out?

Domg13 · Apr 10, 2014

J_E_D_70 :

I don't to recopy what I posted if you can take a look at what I said right before this it would be really helpful!

Ezoz · Apr 10, 2014

Im not familiar with that psu, check its amp specs on 12+ rail/s and then look at your new card requirement.
Sounds to me like one or two problems, your rig or card gets to hot or your power supple isn`t strong enough.
Can you adjust the fans on your card manually? A to hot card would usally give you bad performance or bsod before it shuts down like that but it doesn`t hurt to try.

Try running a/the game that would crash your rig without one or two side panels to further narrow the problem down.

Do you have one or more rails?
If so, put your gfx on one and your fans, hd and sutch on the other/s.

Domg13 · Apr 10, 2014

Ezoz :

SuperNOVA NEX750B BRONZE Thats the series of my PSU
I went to newegg just to double check the specs, and it says i have 4 +12V Rails.
Since i've never encountered a problem like this how to I pick what goes on each rail?

Ezoz · Apr 10, 2014

Domg13 :

You`re psu can give 20amp per rail, your card wants 42amp on a single rail, that is a very probable cause for the shutdowns. Eather buy a new psu with one strong rail or use one 6/8 pin pci e connector from two diffrent rails. It shoud work since your psu is of a good brand but I AM NOT RESPONSABLE FOR ANY DAMAGES caused to your hardware. I dont recommend it, but it note: SHOULD work. The pci express Cables comming from the psu is usally rail one, and then the first modular port for pci express would be rail 2. If there labeled, use rail 3/4 for the new card so that all fans hdd cpu and so on has its own rail 1 to work on.

Domg13 · Apr 10, 2014

Ezoz :

Domg13 :

You`re psu can give 20amp per rail, your card wants 42amp on a single rail, that is a very probable cause for the shutdowns. Eather buy a new psu with one strong rail or use one 6/8 pin pci e connector from two diffrent rails. It shoud work since your psu is of a good brand but I AM NOT RESPONSABLE FOR ANY DAMAGES caused to your hardware. I dont recommend it, but it note: SHOULD work. The pci express Cables comming from the psu is usally rail one, and then the first modular port for pci express would be rail 2. If there labeled, use rail 3/4 for the new card so that all fans hdd cpu and so on has its own rail 1 to work on.

I really don't want to risk having damage to anything, You have been very helpful. If i'm going to go with a new PSU what would you recommend? My case tower is an antec 1200 by the way. Do you think I have a stronger chance of damaging a piece of hardware going with the second option?

Ezoz · Apr 10, 2014

If you have the Money for it go with Corsair rm 1000 thre reliable and quiet, then you`re future proof if you want to go sli two 780ti`s later.
Otherwise go with XFX ProSeries Core Edition 850. it will surve your current card well!

You`re old 7870 needed 23 amp per rail and your current psu allmoast handled it, atleast to the Point it didnt crash.

Im 99.9% sure that you`re problem is found.

Youre welcome mate.

Ezoz · Apr 10, 2014

Reggarding option 2 you probably burn your psu if it doesnt handle it. BUT it can be worse, it all depends on how fast it going down IF its going down. if you have an old spare computer and gfx you can hoc up the psu there and se if the psu can handle running two rails to one card without damaging your current setup.

PC randomly turns off!

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