So THIS happened (burnt mobo pins), what should I do?

[Snapman]

I have a mobo/psu combo that is burned just like that, both still run surprisingly.

[brocktice]

I described this problem some time ago along with the fix here: http://blog.brocktice.com/2011/05/10/too-much-power/

The problem is you need high-current-rated molex sockets on the ATX 12v pins. It's a cheap and easy fix. Even high-end PSUs like the Corsair AX1200 do not have these pins, an issue I bugged their tech support about.

H/T ArtForz for telling me about this in IRC ages ago.

[malevolent]

Had the same thing happen to me after two weeks 24/7 of mining with heavily overclocked 3x5850 and an overclocked Q9300 (not mining, about 30% load). Replaced the 24 pin PSU connector with 10cm of wires (used an old PSU for that) and everything has been working fine ever since.