Will the wrong connector kill my motherboard?

Zach Manos

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Oct 10, 2014
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I was real excited to get a new GPU. The only problem was, the one I wanted was a little too powerful for my PSU.

I have a 600W from another computer that I tried installing.

The main power connector was a different size however.

If I did the right research(should have done that to begin with), I believe I tried plugging an ATX plug into an AT/LPX socket.

I got a few fan turns, and then nothing. I reinstalled the old 300W unit, and the same thing happens.

I knew what I was doing, and was prepared to accept the consequences, but now I'm asking for your help.

Can anyone give a best guess(es) as to what my current issue is besides being an idiot? Did I fry the motherboard, pop a cap, or worse??
 
Solution
Proprietary OEM connector on that board so the pins wouldn't have matched up at all.

I would assume you've toasted it by either hitting 5V with 12V or 3.3V with 5V. Or running power through backwards. Good boards will have protection against such things, but given that it is an Acer board, and that no one should be attempting to use an unmodified ATX connector on a non-ATX board, they probably didn't go to the expense of doing so.

My suggestion would be a new motherboard and to give your CPU and memory a try:

http://pcpartpicker.com/part/gigabyte-motherboard-gah81ms1

Eximo

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Proprietary OEM connector on that board so the pins wouldn't have matched up at all.

I would assume you've toasted it by either hitting 5V with 12V or 3.3V with 5V. Or running power through backwards. Good boards will have protection against such things, but given that it is an Acer board, and that no one should be attempting to use an unmodified ATX connector on a non-ATX board, they probably didn't go to the expense of doing so.

My suggestion would be a new motherboard and to give your CPU and memory a try:

http://pcpartpicker.com/part/gigabyte-motherboard-gah81ms1
 
Solution
Hi

http://www.playtool.com/pages/psuconnectors/connectors.html

This site has pictures of all common connectors on motherboards from
PC , PC XT , PC AT up to to modern times

Modern Graphics cards use pci-e. Connectors with 6 pin or 8 pin connectors
Supplying 75 or 150 watts at 12 volts
These look similar to atx 12 volts 4 pin or 8 pin Eps 12 volt which provide 12 volts to regulator for CPU ( they are different enough not to fit in wrong location)

Regards
Mike Barnes
 

Zach Manos

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Oct 10, 2014
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That's what I was afraid of. The sadness in sinking in now :( hahaha Thanks for your time

 

Eximo

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Don't worry, not the first person to come on here with this exact problem. Luckily it isn't a hugely expensive part to replace with better or equal quality.

With any luck the CPU and memory were protected by the chipset as I doubt the motherboard ever got far enough along in its POST to power them.