Gigabyte mobo fire

Moosetrick

Commendable
Nov 12, 2016
11
0
1,510
New build with a GA-z170x-ultra gaming mobo. Plugged in the Psu. Flipped the switch. USB and Graphics card show power, no problems. The second I push the button to power on the mobo I hear crackling and see a bright arc in the upper left corner of the motherboard. Pulled the plug and saw underneath all the smoke a charred mark right next the the 4x4 pin CPU power connector. All the wiring looks good. Nothing touching the back side of the mobo. Fire occurred in area where nothing could touch since case panels were removed. Could my PSU have caused this or did I get a defective mobo? Could there be other damage? Don't know what to do.... plz help!!
 
Solution
Hmm, it's rather low, since usually a 12V short doesn't break things further down the 12V rail. But it's always a possibility the GPU or CPU got damaged. Can you post pics of the burn marks?

Did you buy the whole as a kit? If you're not really sure of anything, I'd RMA the whole....depends on if the place you bought it allows it.

Natsukage

Estimable
Oct 28, 2016
1,264
0
2,960
Hello.

Were you sure you connected the 4x4 pin correctly? If it was on the wrong side for some reason, it might explain it. Otherwise, it can't be explained by anything else than a failed motherboard imo.

What is your PSU, is it from a good brand?
 

Moosetrick

Commendable
Nov 12, 2016
11
0
1,510


Corsair RM850X. The connections on the psu are labeled CPU and PCIe together.

 

Natsukage

Estimable
Oct 28, 2016
1,264
0
2,960
Well, I haven't heard about RM850x giving any issues. If you're sure no plug was upside down, then I suggest you RMA your motherboard and your PSU. I bet both are broken by now, but who knows which is the real cause.

You can always use the resistor test and check if the voltages are actually 12V on your 4x4 CPU plug using a voltmeter?
 

Natsukage

Estimable
Oct 28, 2016
1,264
0
2,960
Hmm, it's rather low, since usually a 12V short doesn't break things further down the 12V rail. But it's always a possibility the GPU or CPU got damaged. Can you post pics of the burn marks?

Did you buy the whole as a kit? If you're not really sure of anything, I'd RMA the whole....depends on if the place you bought it allows it.
 
Solution

Moosetrick

Commendable
Nov 12, 2016
11
0
1,510
So it turns out, the 12v connection separated from the structure a bit while plugging in the connector. Once power was applied it turned into an arc welder and set the board aflame. No damage to CPU or GPU.

Note: be extremely careful when connecting anything on a gigabyte mobo.