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 Post subject: Why you should never use extensions
PostPosted: Wed Apr 10, 2013 4:42 pm 
8086
8086

Joined: Sat Dec 04, 2004 5:58 pm
Posts: 32
Location: Underground
Could not unplug this connection. Replaced my power supply, thankfully without any damage to motherboard or other components. This was the connection for 8-pin ATX 12V power connector:

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 Post subject: Re: Why you should never use extensions
PostPosted: Wed Apr 10, 2013 4:51 pm 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5537
I don't get what this is supposed to be. The most I can make out is it's a 4-pin Molex to something.

And this sort of thing depends on a lot of other factors too.


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 Post subject: Re: Why you should never use extensions
PostPosted: Wed Apr 10, 2013 9:26 pm 
Boy in Black
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Joined: Thu Jun 24, 2004 1:40 pm
Posts: 24373
Location: South of heaven
Agree. There's a lot of other factors, but that power supply should have shut down to save the core parts instantly, let alone to save itself. These units should not become welders, so please name the PSU that allowed this to happen so we can put them on our crap list.

OP, that is NOT the standard 8-pin ATX 12v connection. I see a lot of wires going in, but it's still slim like a 4-pin Molex. Something is very weird here and probably why you needed an adapter in the first place.


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 Post subject: Re: Why you should never use extensions
PostPosted: Thu Apr 11, 2013 7:37 am 
Team Member
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Joined: Wed Aug 12, 2009 12:09 pm
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Hmm, what to make of it?


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 Post subject: Re: Why you should never use extensions
PostPosted: Thu Apr 11, 2013 8:29 am 
8086
8086

Joined: Sat Dec 04, 2004 5:58 pm
Posts: 32
Location: Underground
I'm sorry, I should clarify. It's not really an extension, but a 4-pin molex to 8-pin ATX 12v connector. The original 8-pin ATX 12v wire from the power supply was not long enough. I just could not believe how bad it melted the molex connector and shielding (and still worked all that time). I will never do that again!


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 Post subject: Re: Why you should never use extensions
PostPosted: Thu Apr 11, 2013 9:29 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5537
From Wikipedia:
Quote:
Despite its widespread adoption, the connector [Molex 4-pin power] does have problems. It is difficult to remove because it is held in place by friction instead of a latch, and some poorly constructed connectors may have one or more pins detach from the connector during mating or demating. There is also a tendency for the loosely inserted pins on the male connector to skew out of alignment. The female sockets can spread, making the connection imperfect and subject to arcing. Standard practice is to check for any sign of blackening or browning on the white plastic shell, which would indicate the need to replace the arcing connector. In extreme cases (as in vintage pinball machines which often use this style of connector), the whole connector can melt due to the heat from arcing.

So moral of the story... Use a proper extension cable, not an adapter.


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