PC randomly shuts itself off with video card connected

August 22, 2012 at 16:27:21
Specs: Windows 7, Intel Core i3
computer shuts off on its own but only if video card is connected. It worked fine for about 18 months and out of the blue this started.

Just tried a new video card with the same result.

anyone have any ideas?


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#1
August 22, 2012 at 18:22:39
Post all your system specs. Especially the model of the power supply and the graphics card.

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#2
August 23, 2012 at 19:57:06
Highly likely is the power supply.

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#3
August 24, 2012 at 06:23:12
CPU - Intel Core i3-550 (3.2 GHz)
Power Supply - LOGISYS PS575XBK (575W)
Graphics Card (old) - GeForce GTX 460
Graphics Card (new) - GeForce GTX 560
RAM - Patriot Gamer 2 Series 8GB SDRAM DDR3 1600 (2 x 4GB)
SSD - ADATA S596 Turbo AS596TB-64GM (OS and Apps only)
HDD - not sure the exact model but it's a couple year old Western Digital 500GB 7200RPM

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Related Solutions

#4
August 24, 2012 at 13:10:49
You have a crappy power supply that sells for $25. The +12V rail is rated at 25A which equals 300 W. I doubt it can even supply that much because the total load in watts adds up to the following. 3.3V@38A=125Watts. 5V@40A=200Watts. +12V@25A+300Watts. Total625Watts.

You need more Amps on a single +12V rail. The first link below is to your power supply. The second link shows total system draw with those cards in use. The Graphics cards pull primarily from the +12V rail. I am surprised that power supply was ever able to support your system.

Buy a better PSU. See the third link below.

http://www.newegg.com/Product/Produ...

http://www.anandtech.com/show/4344/...

http://www.newegg.com/Product/Produ...


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#5
August 24, 2012 at 19:45:15
Agreed. The power supply probably just barely supported your old video card.
Cheap power supplies (or the manufacturer's of them at least) push up the rated wattage by giving you higher amperage on the 5Volt and 3.3Volt rails because this is easier and cheaper to do. This inflated amperage you cannot use because your system will never need that much on those voltages. All of a system's high draw components draw their current from the 12Volt rail but it is more expensive to give you enough current there so they do not bother. There are actually quality power supplies rated at just a little over 400 Watts that can truly supply significantly more current to your graphics card than yours can. The one Othehill lists above is a good one and should do well for you.

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


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