[Juan Carlos]

Hi, i'm having the seemingly common problem of random restarts / shutdowns on my computer.

This is my computer:
Motherboard Gigabyte GA-970A-UD3.
CPU AMD FX-6100 3.3GHz.
2 X 4GB DDR3 Corsair Vengance at 1666 MHz.
HDD WD Blue 1T SATA3.
Video card Biostar AMD Radeon HD 5450.
PSU 600W

It worked fine for about six months, then this problem began.

Here's what i tried:
- CHKDSK - OK.
- memtest - OK.
- Clean windows 7 installation - Problem persists.
- Swap Videocards with a friend's - Seemed to solve the problem, but since the restarts / shutdowns are completely random, i don't want to buy a new videocard unless i'm completely sure.
- Update video drivers - Problem persists.

I also run AMD OverDrive (not to overclock, just to check voltages and temp), GPU-Z and HWMonitor. This are the results:

AMD OverDrive:
 20140128_20_21_48_ThermalZone.txt   47.95KB   221 downloads

 20140128_20_21_48_Voltage.txt   31.97KB   193 downloads

GPU-Z:
 GPU-Z Sensor Log.txt   15.2KB   193 downloads

HWMonitor:
 HWMonitor.txt   42.27KB   201 downloads



Some voltages seems odd to me, but i'm no expert. Could that be the problem?

Thanks in advance.

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Juan Carlos

There is nothing that I can suggest that you have not already tried I`m afraid

The AMD Radeon HD 5450 does look like the most likely cause of the issue as you have ruled out anything else with the troubleshooting that you have done.

What is the brand and model name or number of the 600W PSU that you have.
What is the replacement video card that you have been using.
Has the computer shut down at all since you swapped out the Biostar HD 5450.

[phillpower2]

Juan Carlos

There is nothing that I can suggest that you have not already tried I`m afraid

The AMD Radeon HD 5450 does look like the most likely cause of the issue as you have ruled out anything else with the troubleshooting that you have done.

What is the brand and model name or number of the 600W PSU that you have.
What is the replacement video card that you have been using.
Has the computer shut down at all since you swapped out the Biostar HD 5450.

[Juan Carlos]

Hi, hanks for your reply.

The PSU is a Shark Net SN-P60, here's the link to the manufacturer webpage:

http://www.shark-net...fuentes/sn-ps60

I replaced my Biostar HD 5450 with a Sapphire HD 7850, but just to test, now i'm stuck with my old 5450.
The funny part is that i tried my 5450 in a friend's computer and it did not restart. Anyway, since the restarts/shutdowns are completely random, it could have been just a coincidence, sometimes my computer works fine for days, and some times it doesn't even complete windows boot.

Are the -12 and +5 VCCH voltages normal?

Thanks again.

Edited by Juan Carlos, 30 January 2014 - 07:08 AM.

[phillpower2]

You are welcome

The PSU is a Shark Net SN-P60

Sorry but I have not heard of that brand of PSU please see my canned text below;

Please note that there is one thing that is possibly worse than using a known poor quality brand of PSU and that is using one that is unheard of, for brands of PSU to trust and brands to avoid please refer to the attached links http://www.10stripe....d/psu/brand.php and http://www.pcmech.co...ad.php?t=208143

PSU database http://www.realhardt...vos/Page541.htm

Are the -12 and +5 VCCH voltages normal?

The -12V is no longer used on modern MBs so you can forget that, the +5V VCCH is the same as the +5V SB (stand-by) which powers the likes of the USB ports/MB when the computer is in hibernation, testing software does sometimes produce anomalous readings and it is often caused by a conflict between the MBs own monitoring software and the likes of Speedfan.

PSU tolerance table;

[Juan Carlos]

So or the sensors are off or the voltages are off... i'll see if i can borrow another PSU to make some tests.

BTW, at my former workplace all the computers had Shark Net PSUs and i've never heard of any problem with them.

Thanks.

[phillpower2]

See how the Speedfan results compare to what you have already;

Download Speedfan and install it.
Once it's installed, run the program and post here the information it shows.
The information I want you to post is the stuff that is circled in the example picture I have attached.
If you are running on a vista machine, please go to where you installed the program and run the program as administrator.


(this is a screenshot from a vista machine)

[Juan Carlos]

Here's the screenshot from Speedfan:

[phillpower2]

Temps and voltages are fine and so if the problem persists then the HD 5450 is the prime candidate as the cause.