Hey guys, my Eth rig recently went down and tonight I went about troubleshooting. For some reason, it was refusing to power on. Unplugged it all and went for 1x gpu. Powered on booted into Windows fine. Tried 2, works fine.
Now this is where it gets weird. As soon as I plug in another pcie cable to my power supply, the rig refuses to power on. Not just not booting into windows; completely no power. If I plug the powered riser into a 3rd gpu: no power on. A couple times while I was trying different things, it wouldn't even power on for the 2 gpus which worked a minute before. Then (seemingly randomly), it will work again for only 2x gpu.
What I've checked/done: checked all power cables/plugs on mb. Swapped power supplies with a new one.
Any ideas where I should start troubleshooting? I really thought it was my PS, but I can't believe I'd have 2 go out on me. Maybe my MB is going bad?
Rig:
Asrock H81 Pro Btc
evga 1k PSU
5x Sapphire Nitro+ 480x
shitty cpu and 4gb RAM
when that happened to me i had an msi card that was shorted at the peg socket, whenever i plugged the cards peg connector in the psu would not turn on (shorted VRM?).
check (again) the cards peg connectors as well a the psu sockets and cables for burned/shorted connectors, and test each card by itself with different psu peg wires/sockets. i know youve already done some of that, but never hurts to check again.
also see if the mobo is maybe flexing when the cards are in it, possibly the mobo traces are grounding?
all the psu cables are for that psu right? different psu can have different cable pinouts even when the plugs match. i accidentally mixed a season and evga psu peg cable and it would not turn on. no damage; i was lucky.
