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24pin ATX melted with after installing SLI

post #1 of 10
Thread Starter 
the power button. so i left it there for about 15mins. and tried again and it powered on, but it wouldnt POST. all it would do is. power on for 3 seconds and power off for 3 second and then power on for 3 seconds and so on. and it would do this forever untill i turned off the PSU at the back. i have a be quiet dark power pro 1000W and thought the gtx 480 sli was darwing too much power. so i discconected everything and took the 20+4pin ATX cable out and on the 4pin part. one of the pins has litterally melted. so im guessing the motherboard is also screwed. however. when i take off one of the gtx 480 and connect the ATX cable it works even though one of the pins have melted. it still shutts off randomly from time to time though. and i have checked both of my 480's one by one and they are also working fine. but when it comes to SLI it just wont post... another thing is that everytime i take a component out and put back in, my BIOS settings get reset for some odd reason. so is my PSU not working or is my Motherboard not working?

oh and my CPU was NOT OC'ed at the time

here are some pictures. off the damage



post #2 of 10
I've never heard of that brand, but it doesn't sound reputable. Good thing it didn't take out your whole system though... Technically speaking, a 1000 watt PSU should be more than sufficient to handle the needs of two 480s; however, a crappy PSU is an entirely different story.

You should really get a new PSU.

Edit: I just looked up that brand of PSU. It has a decent rep. Kinda surprising it did this.
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post #3 of 10
Thread Starter 
yeah this PSU is very very high end. i bought this for about £200 back then. its a german make, u might not get it in the US but you get it here in the UK
post #4 of 10
Quote:
Originally Posted by jivenjune View Post
I've never heard of that brand, but it doesn't sound reputable. Good thing it didn't take out your whole system though... Technically speaking, a 1000 watt PSU should be more than sufficient to handle the needs of two 480s; however, a crappy PSU is an entirely different story.

You should really get a new PSU.

Edit: I just looked up that brand of PSU. It has a decent rep. Kinda surprising it did this.
bequiet power supplies are defo not a "crappy" brand, theyre a high end brand but rarely used as theyre quite expensive. they are in no way crappy.
     
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post #5 of 10
I know some EVGA boards [Just because it was on the EVGA forums...] drew too much power from the 12V rail / s and caused melting....

Though it occurred with 480's typically in Tri-SLi.. not a Dual SLi configuration...hmm

If anything I'd send [or at least try to] the PSU for an RMA, and as for the board, it's probably perfectly fine, try with a toothpick to flake off the black PSU melted plastic from the slot :\\

I'm not a fan of the BeQuiet brand personally, have had friends over the pond buy them then complain about RMA service... Seasonic has always been a safer bet, or other companies who use SS OEMs [Like Corsair in some models]. However, they are solid units, and this sort of melting isn't really expected for a £200 PSU.

Try to RMA.. that's really your only option :S
Edited by Munkypoo7 - 6/1/11 at 3:24pm
    
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post #6 of 10
Haven't seen a post with a melted ATX for a while, the evga classy did it to a couple people running multi gpu, think it is the reason higher end boards started adding molex & sata connectors for extra juice to the pci-e.
480s can draw a lot of power, not sure if the mobo or the psu was the problem...
    
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post #7 of 10
seen this before on EVGA boards, thats why now everybody adds molex connectors to power the PCI-E lanes.

EDIT.

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post #8 of 10
Thread Starter 
hmm well unfourtunatley my warrantey for my PSU has been finished for a while now. the only option is to replace the melted wire? or is that not possible
post #9 of 10
Quote:
Originally Posted by xivlia View Post
hmm well unfourtunatley my warrantey for my PSU has been finished for a while now. the only option is to replace the melted wire? or is that not possible
you could do that, you can buy new plugs etc. so can be done. look on websites that sell modding stuff. OCUK used to carry that sorta stuff. but have a look at chilledpc and watercoolign uk. changing the plugs to different colours seems to gone out of fashion recently though
     
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post #10 of 10
Thread Starter 
Could it be a loose connection ? I've cleaned the burnt out connection on the motherboard and stripped the melted plug (so the metal connector is exposed). Now it fits better and the pc has been on overnight with no problems, yet.

Also, there is a hissing sounds. I think its coming from the psu but can't tell exaclty. Could this a capacitor leak ? Is this a major problem ?

Thanks.
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