Solved Power Supply may be failing?

Silverstone Silverstone fp34b usb 2.0 ca...
July 24, 2012 at 08:54:19
Specs: Windows 7, Q6600 Intel 8GB Gskills DDR@
I may have a power supply going bad. When I first turn on the computer it instantly powers on for just a second then instantly goes off. I then have to flip the switch on the back of the power supply and then press the button on the front and it will boot up as normal. However my games seem to be crashing. I am thinking that maybe the power supply could be failing under load. The motherboard was replaced about a year ago and the video card is about 8 months old.

Could someone maybe tell me if these readings are normal:

This is what the utilities OCCT 4.3.1 reports for power supply readings

power supply 12v Report 12.29V
Power Supply 5v Reports 4.93V

Speed Fan reports a litle more detail

I have uploaded a screen shot

http://tinypic.com/view.php?pic=2yz...

My Specs are:

Windows 7 64 bit Sp1 installed, 8GB of Gskills DDR 2 Ram. 4x 2gb Dimms
BFG 800 watt power supply (about 4 years old) Evga 780i ftw motherboard.

Any advice would greatly be appreciated.

Thanks,

Coop5796

coop5796


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✔ Best Answer
July 24, 2012 at 19:05:12
Coop...: The voltages you posted on the image are hovering closer to and even over 10% from the nominal where they should be more like +/- 5% from the nominal voltages. This makes the power supply suspect, at least to me it does.
Look for power supplies that are at least 80% certified efficient, active PFC, has a single 12 Volt rail, and is a quality name brand. Sometimes a better power supply also has a longer warranty which is a possible indication of a better quality.
Look at these:
http://www.newegg.com/Product/Produ...
http://www.newegg.com/Product/Produ...

You have to be a little bit crazy to keep you from going insane.



#1
July 24, 2012 at 09:02:17
I can't view the screenshot (I'm at work, site is blocked). The voltages you listed are within tolerance but that doesn't necessarily mean the PSU is putting out the proper amperages.

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#2
July 24, 2012 at 09:22:41
I doubt it is the power supply but the easy way to test is to swap it out. The hard way is to get a graphing scope or meter to find out if it is failing.

Google is evil


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#3
July 24, 2012 at 09:26:58
Vcore-1.28v
12V+-10.93v
AVcc-3.25v
CORE/A-2.56v
CORE/B-3.31v
3.3V-3.25v
5V-5.43v
12V-10.37v
-12V- -12.29v
-5V- -6.19v
Vcore- 3.00v
3.3V- 3.21v

I am a hardware guy not a software guy but i try to help.


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Related Solutions

#4
July 24, 2012 at 10:33:16
i have a multimeter so i could go that route. one thing I did think of is the floppy drive has failed a while back..not sure if that could create some sort of short..i may disconnect it and see what happens. Looks like according to jays post I am within those ranges. Should i consider a power supply tester? i might also see if i can find a way to replace the front switch just to rule that out. Thanks for all your help!

coop5796


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#5
July 24, 2012 at 10:35:01
Update on good voltages.
VCORE: 1.432V
3.3V: 3.136V
5V: 5.273
12V: 12.144V

Might decrease when there is a load.

I am a hardware guy not a software guy but i try to help.


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#6
July 24, 2012 at 19:05:12
✔ Best Answer
Coop...: The voltages you posted on the image are hovering closer to and even over 10% from the nominal where they should be more like +/- 5% from the nominal voltages. This makes the power supply suspect, at least to me it does.
Look for power supplies that are at least 80% certified efficient, active PFC, has a single 12 Volt rail, and is a quality name brand. Sometimes a better power supply also has a longer warranty which is a possible indication of a better quality.
Look at these:
http://www.newegg.com/Product/Produ...
http://www.newegg.com/Product/Produ...

You have to be a little bit crazy to keep you from going insane.


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#7
July 25, 2012 at 20:43:17
Fingers thank you for your reply it was a big help. So you think I am safe with a 750w? I used a PSU calculator on the Antec website(another psu manf.) and looks like they recommend at least a 600w. My old one was an 800w so wanted to make sure as I may go ahead and buy one.

coop5796


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