How would this happen?

[shaz2sxy]

So have been issued with my PC, restarting when gaming. 

Noticed psu cable wasn't in 100%

 

Took it out to set it like this

 

What would cause this

 

PSU - nzxt h1 650w gold. 

Cable is 2x 8 in pin to 12 pin nvidia? 

 

The cable is from seasonic but the pin outs match

 

 

 

[Fasauceome]

3 minutes ago, shaz2sxy said:

Noticed psu cable wasn't in 100%

If there was an air gap causing the current to arc, the exposed electricity could have caused burning.

[tkitch]

Are those two pins pushed back into the housing?

[shaz2sxy]

26 minutes ago, tkitch said:

Are those two pins pushed back into the housing?

The surround is melted and pind discoloured 

[shaz2sxy]

3 hours ago, Fasauceome said:

If there was an air gap causing the current to arc, the exposed electricity could have caused burning.

very odd, as its been working fine for months.

 

luckily nothing else broken

[Guest]

18 minutes ago, shaz2sxy said:

very odd, as its been working fine for months.

 

Well, yeah.  Stuff like this doesn't happen instantly.  It takes a number of heat cycles.

[shaz2sxy]

31 minutes ago, jonnyGURU said:

Well, yeah.  Stuff like this doesn't happen instantly.  It takes a number of heat cycles.

yeah it makes sense

[H713]

Poor connection. You mentioned it wasn't plugged in all the way, that's likely the culprit. Not being fully seated probably resulted in a relatively high contact resistance. Since these are carrying quite a bit of current, the I^2R heating was obviously enough to permanently damage the connector. 

 

Why the restarts? Above a certain load current, the voltage will fall below the minimum required by the power converters on whatever this is powering (GPU??).  This is basic ohm's law.

 

I doubt there was much, if any, arcing taking place for a few reasons. First, it's pretty low voltage. Second, it would likely make the system incredibly unstable, the the point of it being nearly unusable.

 

Check the mating connectors. I can almost promise that they're damaged / destroyed. You may find them rather difficult to desolder, since most of these boards have more than 2 layers, so the ground connections may have a lot of thermal mass.