Rig was a MSI 790FX-GD70 with 4x 7950 Sapphires.
PS is Seasonic SS-1250XM
Last time I measured the power draw at full load it was about 1100w.
It was cooled by me putting a box fan next to the whole thing. It seemed to work fine for a week.
Today I smelled smoke, and it continued to work perfectly fine for a few hours after that then finally just powered off and wouldn't power on.
Upon inspection I could see pins 10 and 11 on the ATX power connector melted and fused with the ports.
https://i.imgur.com/7jrD7qu.pnghttps://i.imgur.com/isYGK7F.jpgBoth of those are the +12V
I've never seen that happen on a normal system. What I'm here to ask is, is there something specific to mining rigs (its probably unusual for most people to put 4 GPUs in a PC and run them at max speed 24/7) that could cause this? Should I have bought a better motherboard or power supply? Or cooled it better? I'm not sure what to learn from this.
I tried googling around and one suggestion was the connection wasn't secure, but I'm pretty sure it was secure, that kind of connector makes it hard to have a loose connection.