Just disable the gpus from 0 to x, where x ur number of gpus one by one and touching them once they cool off and sticky a note beside with their number, so you will know later on. It cant be any simpler...

just disable it with number on keyboard connected to rig, or over ssh, let it cool down for couple of minutes and you will be able to identify it easily.

As for pice numbers on motherboards, they can be random as well, just take a look for example:

https://imgur.com/a/CTw1p

I had that version but on the monitor i was getting only errors, but it was hashing ok. Don t know about your mobo, maybe u need other bios settings.i can t pm you as well;)

Hi. i have "simpleminer-RX-v1118-kernel4.11-17.30-noae[Suspicious link removed]g..>" from download.simplemining.net. 6 gpus like yours with 30.3 mh each. what mobo do u have?

Hi all.
After several hours of reading this forum from around page 250 to found a cure to my problem and to don`t waist your time with "maybe" trivial questions I get to the conclusion that I cant solve this problem alone.
So since day 1 I got some issues with hashrate. I am using 6x Sapphire nitro+ rx 580 8gb gpu and getting 17Mh/s a card mining Eth using eth miner which  is very low and I realized its even abnormal. This hasrate even after I used the oc settings, before oc I got around 14-15 Mh/s. After 3 days of mining nothing was changed, the only good news, the system was stable. After reading this forum I found out that there was the Dagfix issue with rx cards so I used the red icon on the console to update the os with the dagfix. Since than no rig. I know, now I have to reflash the original os to the usb and reboot the system with it but probably this not solve my original problem of very low performance. (Also I tried the cards in windows and without bios and oc flash they are pulling 24Mh/s each.
Hope someone can point me to the root of this problem. Cheers.

send me message, I will try to help as much as I can.