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Need help figuring out if the Power Supply is faulty, and buying a new one.


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#1 Persegan

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Posted 19 April 2015 - 02:04 PM

Hello everyone,

 

First of all, let me put the specifications of my computer:

Mainboard : MSI Z77A-G43 (MS-7758)
Chipset : Intel Ivy Bridge
Processor : Intel Core i7 3770K @ 3500   MHz  (max : 8541)
Physical Memory : 16384  MB DDR3-SDRAM
Video Card : AMD Radeon HD 7900 Series
Hard Disk : Seagate ST3250820AS (250GB)
Hard Disk : Seagate ST3500418AS (500GB)
CD-Rom Drive : DTSOFT Virtual CdRom Device
Monitor Type : BenQ BenQ XL2411Z - 24 inches
Monitor Type : Samsung SyncMaster - 17 inches
Network Card : Realtek Semiconductor RTL8168/8111 PCIe Gigabit Ethernet Adapter
Sistema Operativo : Windows 7 Ultimate Professional Media Center 6.01.7600 (64-bit)
DirectX : Versión 11.00
 

 

 

I have a problem with my computer, and I'm posting a message in these forums with the hope someone can help me. When playing certain games like Teslagrad, Darksiders, Shadow of Mordor, Guild Wars 2, Heroes of the Storm, and others, my computer sometimes suddenly shuts down (as if I flipped the swtich) and reboots itself automatically. While with some games I solved this issue turning Vsync on, for others this didn't work.

 

I ran an Avast scan, a Malwarebytes scan, and an Advanced System Care scan in order to find out if it was the problem of a virus or similar. Everything was fine. I used slimdrivers and driver booster to update all the drivers I could, but I still had that issue. I updated the BIOS, and still happened. So I concluded that the problem had to origin from hardware, and not software (please correct me if I left something unchecked).

 

I tried monitoring the temps of my CPU and GPU. CPU was overheating a little bit, so I changed the thermal paste, but it improved only a little bit (max temp around 60º, which as far as I know is okay). GPU achieved a maximum of 70º, which is also okay as far as I know, but the problem persisted.

 

I conducted a CPU stress test using Prime95 during 8 hours, and didn't get any error, but as soon as I tried using FurMark to stress test the GPU, I found the effect of this stress test were the same as some of the games mentioned: My computer rebooted itself automatically. 

 

FurMark itself tells you it may be a Power Supply Unit problem, and since my GPU isn't overheating, I'm guessing that's the source of the problem? It also tells you it could be a VRM problem, but I'm not sure what that is. Also, according to CPUID HWMonitor, I think the voltages are a bit off, the +12V stays around 8V, and I'm not sure that's okay. Attached to this message you should be able to find the monitoring data.

 

With this info, is it same to assume it's a Power Supply Unit problem and that by buying a new one it's most likely the problem will be gone unless another component is also faulty? Or am I leaving another possibility unchecked? Could I get some help with this?

 

Also, if that happens to be the problem, I plan to buy this new Power Supply Unit:

 

http://www.pccomponentes.com/tacens_valeo_v_700w_80_plus_silver_modular_reacondicionado.html

 

Could I get some opinions on it? I think I don't need 700W and i'm ok with 500, but better safe than sorry imho. Also, anyone has experience in buying refurbished power supply units? Is it too risky?

 

Thanks, and sorry for the long post. 

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#2 Chris Cosgrove

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Posted 19 April 2015 - 05:36 PM

I agree - you have power supply problems !

 

The +12V line should not exceed 12V +/- 0.5V; the 5V line should not exceed 5V +/- 0.25V.

 

The only reservation I have about your proposed PSU is 'reacondicionada' - I think this means reconditioned. I would advice buying new for a PSU. Certainly my local supplier can sell a new one with similar spec for about the same price.

 

Chris Cosgrove



#3 Persegan

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Posted 20 April 2015 - 02:39 AM

Thanks a lot for your help man!


Edited by hamluis, 20 April 2015 - 09:05 AM.
Removed unnecessary quotebox - Hamluis.


#4 coxchris

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Posted 20 April 2015 - 12:56 PM

I have a Corsair 750W in my rig but I see your in the UK or somewhere in Europe 

 

http://www.amazon.co.uk/Corsair-CX750-Builder-Series-Bronze/dp/B008RJZR40/ref=sr_1_1?ie=UTF8&qid=1429552133&sr=8-1&keywords=corsair+750w+psu

 

I have the same reservation as Chris

 

Corsair is the best brand IMO and has latest me since more then 5+ years 


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#5 Persegan

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Posted 20 April 2015 - 01:56 PM

I have a Corsair 750W in my rig but I see your in the UK or somewhere in Europe 

 

http://www.amazon.co.uk/Corsair-CX750-Builder-Series-Bronze/dp/B008RJZR40/ref=sr_1_1?ie=UTF8&qid=1429552133&sr=8-1&keywords=corsair+750w+psu

 

I have the same reservation as Chris

 

Corsair is the best brand IMO and has latest me since more then 5+ years 

 

Yeah I live in Europe, I've heard good things from that brand, I guess I'll try to buy that one, thanks a lot!



#6 OldPhil

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Posted 20 April 2015 - 02:52 PM

Take a few minutes to add up your systems piece by piece, CPU, GPU etc, once done buy a PSU that provides about 25-36% more than it needs.  PSU's degrade over time, also do not work as hard or get as hot when supplying under its capacity.


Edited by OldPhil, 21 April 2015 - 10:37 AM.

If you don't stand for the flag then you will fall for anything!


#7 coxchris

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Posted 20 April 2015 - 05:53 PM

Thats more then enough for his rig and it will provide him with future upgrades as he wants. I recommend PSU that are higher because of the buffer of the overhead of needed power. If you take the wattage of the per part  and get 400 watt PSU then you get brownouts or not enough power to plug in all the various parts and in the future of buying more wattage 


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#8 Scoop8

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Posted 21 April 2015 - 08:04 AM

Good advice from OldPhil and coxchris .

 

When I was selecting components for my Win 7 Desktop tower back in 2010, I went way overboard with my P.S.  My wattage requirements were around 300W, perhaps 350 max so I got a 750W P.S. 

 

I did the same thing with my tower cooling, getting a "gaming" mid-tower even though I'm not a gamer.  I wanted front/back fan flow for better cooling with an expansion fan capacity.

 

Components run better and last longer with more cooling dissipation capacity (larger wattage specs) than the minimum specs require for hardware.



#9 Persegan

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Posted 21 April 2015 - 01:58 PM

Thank you everyone for your help! I got a new PSU and mounted it, and the problem seems to be gone!

 

I say seems because HWMonitor still registers the 12V as 8, but oddly enough, stress testing the GPU (which previously caused my pc to crash) and playing the games that made the computer crash no longer seem to cause any malfunction.So I guess the problem is solved :) 



#10 coxchris

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Posted 21 April 2015 - 04:30 PM

HWmonitor doesn't always get the correct wattage and its bad to use it to diagnosed a failing PSU.  If you want to get true wattage you need to test the rails wattage and compare these wattage values to the paper in the psu manual and on the unit itself. However you need a mutimeter to test or a PSU tester to test. 

 

Typically you see other sign with a  failing PSU other then wattage. 


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