Hi, so this is the story, I built my first mining rig for fun, just 3 video cards (although I was testing it for a few days with just one card).
Mobo: MSI Krait Z270
CPU: i5 7400 (stock cooler)
RAM: Ballistic 8gb DDR4
SSD: PNY 240gb
Power supply: CORSAIR RM850x
GPU: GIGABYTE RX 570 4gb (the others still in their boxes SAPPHIRE RX 580 8gb)
All of these brand new, sealed in their boxes.
I set it up open case, the motherboard directly on top of the cardboard box of the power supply which is just the right size for the mobo.
Everything worked fine for like 12 hours, in the middle of the night, everything shut down, when I hit the power button nothing happens, so I disconnect the power supply from the outlet and hit the swich off and then on. I try to power on the computer again, it starts for 1 second, and it shuts down again, it doesn't want to start again. So I reset once again the power supply, this time the computer powers on fine for 3 seconds, and then I see a spark coming out of the gpu and it smells like burnt components so I quickly hit the switch on the power supply and that's it, I don't want to turn anything on again and I'm afraid that if I install the sapphire GPUs the mobo or the power supply or something is going to burn them up.
My question is, who was the likeliest culprit, the mobo, the power supply or just a defective GPU?
What should I do to test?
I have an old mobo where I could test the GPU, with the same power supply.
I will upload some pics of my setup
http://http://http://http://http://