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/CTw1pThanks for fast reply, but... Is there any other way because I don't use ssh.
On the picture what you linked there, the PCI full slot is the GPU_0. That's mean maybe that in all mining motherboard the full pci slot is the GPU_0? I am using the Biostar TB250-BTC PRO motherboard which got some number markings on the pcb but I think they are not in the same order as smos numbering them.