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Melted 8 pin 12v

post #1 of 46
Thread Starter 
Any ideas on what would cause the 8 pin top row of connectors to get so hot they melted the plastic around thoses 4 pins but bottom row looks ok. Happen to my sig rig. Started to have weird probs so i took a look and found that.
    
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post #2 of 46
wow that sounds bad. pics? I have no idea, maybe you have too much volts going into the mobo somehow? That is a really good PSU you have though. Maybe the PSU guru will stop by to explain!
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post #3 of 46
Thread Starter 
Should have took pics but didnt, and ya too much of something-lol. never seen that befor. It still works.
    
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post #4 of 46
The 8 pin cpu connector? If so you're cpu was pulling WAAAAYYYY too much power. I've actually never seen this... I've seen the 24pin go but you killed the 8 pin

It's not something like ripple or VREG issues as that's quite a good unit. The only thing that comes to mind is a bad mobo or a bad psu...
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post #5 of 46
the only time I've ever seen a bad CPU connector was when a power supply failed from a lightning strike. It didn't melt the plastic, it burned the traces out of the motherboard's PCB.

I'm sure there is something else going on here for it to have gotten that hot for a long enough period of time to deform the plastic.

Also take pics or it never happened.
Edited by bane-o - 10/13/11 at 11:32pm
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post #6 of 46
Thread Starter 
Oh it happened-lol, and i was very like *** my self-15 years of building systems i have never seen this. And the highest i have ever set vcore was 1.5-and it would pull 1.56 under full stress and oced to 4.2. It still works, all my temps are good, the highest my cpu ever has been since i put this psu in was 64c, mobo barely 30c.

And my current oc use to run stable 24 hr prime-plus ibt/linx, but the fact remains i started haveing issues so i pulled the rig apart and found the top 4 pins blackened and the plastic around the pins melted. Going to contact Sparkle today.

Plus i have never seen any power spikes or drops to be concerned about and i monitor all my systems very well. Will snap pics today when i pull it back apart again.
    
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post #7 of 46
Thread Starter 
System runs fine, except when i run ibt/linx/prime95, thats when the 8 pin will heat up to the point i can not hold on to it, i pluged in one of my extentions, when at idle or just normal use-all ends are fine, but when stresses the connection from the 8 pin from psu to extention get so hot i cant hold onto it more than 20 secs, other end into mobo of extention is barely warm.
    
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post #8 of 46
seems like its not making perfect contact with the pins check if they arent loose or maybe just a bad fit on the board bad contact could case a high resistance area which heats up
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post #9 of 46
So, any updates?

I'm having the same issue, and I'm trying to figure out if all I need I a new mobo, new PSU or it's my cable extension's fault.
post #10 of 46
I've seen this at work a number of times, and the PSU was usually to blame. It is possible that something (dust or whatever) got into the connection and caused an increase in resistance in the connector itself, thus building up heat to melting/charring point. Both times I've seen this in the last year, however, the PSU ended up being to blame.

I'd recommend testing the PSU, or replacing it if you want to take a chance. That's where I'd put my money.

Edit: You're also going to need to replace those damaged connectors, so if the mobo connector is damaged you're pretty well boned. I've seen a mobo continue to operate with melted/charred connections, but you're really taking a dangerous risk of fire if you do.
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