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Computer shuts itself down randomly and won't power back on unless...

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January 14, 2013 10:13:11 PM

Hello,

Computer shuts itself down randomly and won't power back on unless I unplug it from the wall. I just replaced basically everything in side except for the PSU. It's a 750watt so it should handle everything fine.

At first I thought it was the ram but it doesn't look to be that. Everything is a normal temp as well. Not sure what to do...
Any thoughts?
a b B Homebuilt system
January 14, 2013 10:18:03 PM

750 watt means nothing.
What is your components and power supply model?

It sounds like a power supply overloading and turning itself off. but just a guess ,not much info to go by.
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a b B Homebuilt system
January 14, 2013 10:40:54 PM

And define everything? Bad caps on a board can cause problems. But def sounds like an obvious PSU issue and that should have been replaced FIRST
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January 14, 2013 11:48:08 PM

I have just put in...

AMD FX-8350 Vishera 4.0GHz
GIGABYTE GA-970A-D3 AM3+ Board
CORSAIR Vengeance 16GB Model CMZ16GX3M2A1600C10
GeForce GTX 660 Ti 2GB 192-bit GDDR5 PCI Express 3.0 x16

I don't know how to find out what my PSU is specifically but I know it's around 4 or 5 years old now. It worked fine with all my old stuff but I just hooked up my new stuff about two days ago.

At first I thought it was my ram but I don't think so anymore.

Thanks for all you're help in advance!
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January 15, 2013 12:02:10 AM

overtime a psu becomes less efficient while it may have been a 750 watt in the past it is most likely not anymore. It might be able to only push 400 watts or 350 etc etc.

does you computer shut off more often when you are doing strenuous tasks such as video gaming? HD videos? it truthfully sounds like a problem with your psu.
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a b B Homebuilt system
January 15, 2013 12:03:28 AM

The psu information will be on a sticker on the side of the psu.
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January 15, 2013 12:10:09 AM

By "everything" he means the make and model off the sticker.
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January 15, 2013 12:19:19 AM

No it will shut off here and there. I could play games for 10 hours and it will shut off or I could be browsing the web between 30 minutes to 3 hours and it can shut off. Not really to specific of a reason I can find. I thought maybe my board was getting grounded somehow but it doesn't look like it. I will try and get the info from the PSU soon.
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January 15, 2013 12:52:37 AM

So the power supply is a Skyhawk Power One GM-670SC12V. I honestly can't even find anything about it but that's what it says on the PSU.
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January 15, 2013 1:11:21 AM

vunyos said:
So the power supply is a Skyhawk Power One GM-670SC12V. I honestly can't even find anything about it but that's what it says on the PSU.


That's enough. It is a mediocre power supply at best. Get a new power supply brands Seasonic, Corsair, or Antec. The power supply is shutting itself down due to something being out of spec. By unplugging it you reset it to try again. One of those times it won't shutdown and instead take a component or three with it.

This one is a great deal http://www.newegg.com/Product/Product.aspx?Item=N82E168...
A CORSAIR Professional Series HX650 650W ATX12V v2.2 / EPS12V 2.91 SLI Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply for $100 after rebate.

You can get a lower quality for cheaper (a bronze) and you can get a 750W for cheaper but that one will run your system and put out more juice than your 750W did when it was new.
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January 15, 2013 1:23:24 AM

It could be a mobo problem guys..... The worst thing anybody else could do was buy a cheap mobo to go with a fx processor.
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January 15, 2013 1:25:52 AM

compgenie said:
It could be a mobo problem guys..... The worst thing anybody else could do was buy a cheap mobo to go with a fx processor.


Since when does Gigabyte fall into the cheap mobo pile? They and ASUS are the 2 best mobo manufacturers. Sure it could be a mobo but considering he has already replace everything except the power supply I will still bet on the power supply.
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January 15, 2013 1:32:17 AM

I mean my PSU ran perfect before I replaced all the other parts so maybe it just can't keep up. Sadly there doesn't look like a single solid answer.
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January 15, 2013 1:39:04 AM

LOL I think you need to reread the posts again. Everyone but compgenie is telling you it is the power supply (psu). Trust me. Replace the power supply with one of the reputable brands I listed before.
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January 15, 2013 1:43:05 AM

jnkweaver said:
Since when does Gigabyte fall into the cheap mobo pile? They and ASUS are the 2 best mobo manufacturers. Sure it could be a mobo but considering he has already replace everything except the power supply I will still bet on the power supply.


Nah, I you got me wrong, I meant u would need a good chip set along with a powerful processor like a 8350 like a 990fx
Gigabyte is one of the best mobo manufacturer, and yes I do agree
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January 15, 2013 1:47:54 AM

jnkweaver said:
LOL I think you need to reread the posts again. Everyone but compgenie is telling you it is the power supply (psu). Trust me. Replace the power supply with one of the reputable brands I listed before.

Oh man I'm not against u guys but I too never said it could not be psu right
Uh sorry jnkweaver I didn't read that he replaced everything. And sorry to OP too
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