http://i.imgur.com/DBCIP95.jpgThis was on one of my CoinCraft Desk modules, which draws around 200W.
Replacing the connectors was a pain in the butt. It took me about 4 hours from start to finish.
It's entirely possible that it simply got 'cooked' by the heat sink rather than the current.
Re Molex at 13A-I wonder which companies PCIe connectors are rated this high. There is no info on EVGA1300 or Corsair pins as far as I could find.