2 burnt pins on ATX power supply cable

Serban · May 28, 2014

Hey guys,

I have the following issue: 2 pins on the ATX power supply cable that brings juice from the PSU to the motherboard have literally melted. I don't know what happened, but it was quite some time ago. The PC runs just fine, except for the occasional restart then the pins won't connect properly. Then I just have to jostle the cable a bit and it runs fine again. I've attached two photos to illustrate the problem.

However, I don't want to live with this. Is there a way to replace the cable without buying a new PSU (which can be quite expensive since I need a powerful one)? Also, how can I clean up the pins in the blue socket on the motherboard?

Thanks in advance!

i7Baby · May 28, 2014

If its a modular psu, easy to replace. You can also get extension cables. You could get an old cable and cut and resolder and re-insulate wires. Otherwise put up with it or replace the power supply.

Do you know what the pins are for? - google wiki pinout if not.

chris987 · May 28, 2014

this is more than a burnt cable issue. even if you could replace the cable(possible only on full modular psu) you shouldnt insist on running the same psu which is more likely to be dead and most probaly have also taken your mobo with it! if you are good with soldering iron then give it a try and replace the connectors otherwise you need to replace both the power supply and the motherboard.these are the 12v pins?, most probably due to bad psu in combination with power hangry gpu

i7Baby · May 28, 2014

Is there any sign of damage elsewhere on the motherboard?

Serban · May 28, 2014

i7Baby :

Thanks for the reply!
I'm not sure whether my PSU is modular or not, I'll have to check that out. Extension cables might be a solution, but it's just a workaround and might make the problem even worse. Cutting the wires and replacing them is out of the question, I don't have the equipment and I'm not good at it.
The pins that melted are the 2 yellow +12 VDC.
Also, there are no other signs of problems on the motherboard, the PC runs just fine. If I refrain from playing anything other than solitaire...

Serban · May 28, 2014

chris987 :

Ok, now you've got me worried. Those are the 12V pins indeed, and I suck at soldering so that is out of the question.
PSU is not the best on the market and this problem happened a while ago. Unfortunately, it got worse when I got a second GPU for SLI. The motherboard is fine, the PC still runs if I don't play anything.

chris987 · May 28, 2014

Serban :

chris987 :

Ok, now you've got me worried. Those are the 12V pins indeed, and I suck at soldering so that is out of the question.
PSU is not the best on the market and this problem happened a while ago. Unfortunately, it got worse when I got a second GPU for SLI. The motherboard is fine, the PC still runs if I don't play anything.

what are your full specs? if you want to stay out of trouble you have to change your psu.!

Serban · May 28, 2014

chris987 :

Serban :

what are your full specs? if you want to stay out of trouble you have to change your psu.!

I'll post them later, I don't know all the model numbers by heart and don't want to get anything wrong.

chris987 · May 28, 2014

Serban :

chris987 :

I'll post them later, I don't know all the model numbers by heart and don't want to get anything wrong.

you mentioned sli didnt you?which gpu? and psu model? your 12v rail is ''hurt'' you shouldnt rely on it any more if you want to use your system at high loads, even if you use only one gpu.

i7Baby · May 28, 2014

Can you also check inside your psu for any damage? eg smell

Serban · May 28, 2014

chris987 :

Serban :

you mentioned sli didnt you?which gpu? and psu model? your 12v rail is ''hurt'' you shouldnt rely on it any more if you want to use your system at high loads, even if you use only one gpu.

Right, here are the specs:

CPU: Intel Core i7-2600K Processor 3.4GHz 8 MB Cache Socket LGA1155
GPU1: EVGA GeForce GTX 580 DoubleShot Superclocked
GPU2: Gigabyte GV-N580SO-15I GTX 580 Super Overclock Series (this one I got about a month ago, however, the cable was burnt before, I just did not notice it)
Motherboard: Asus P8Z68-V PRO
PSU: Corsair 1050W HX Modular CMPSU-1050HXEU
Ram: DDR3 8GB KIT 4x2 PC1600 Kingston HyperX XMP
HDD1: RevoDrive PCIe SSD 120 GB
HDD2: SATAIII 2000GB WD Caviar Black WD2002FAEX

Serban · May 28, 2014

i7Baby :

I did take a close look at it, but didn't notice anything odd. I haven't opened it.

chris987 · May 28, 2014

that is a quality psu you have and more than capable for your setup. what cable was already burnt? i would care for a psu rma. it has 7years warranty afterall!

Serban · May 28, 2014

chris987 :

My theory is that I might have had a surge at some point, which damaged at least one of those pins, but I didn't notice anything wrong. When I brought the second GPU it only got worse. Luckily, the PSU is modular, so I should be able to replace the cable. Once that's done it should run smoothly again. The only thing I worry about though, is cleaning all that melted plastic from the blue socket. That can be a fire hazard.

chris987 · May 28, 2014

Serban :

http://www.corsair.com/en-us/hx-series-hx1050-power-supply-1050-watt-80-plus-gold-certified-modular-psu if that is your psu, is semi modular meaning you can change everything except the 20+4pin ATX and the 4+4 cpu cable

Serban · May 28, 2014

chris987 :

Yes, that's the one. I submitted a ticket to Corsair, let's see what they tell me. I purchased the PSU in 2008 from a retailer, not directly from Corsair. I wonder if the warranty still holds.

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