There could be an option or just an usual feature when HiveOS marks each GPU with a number ( 0,1,2,3,4…) or a letter (A,B,C,D…) so when you select GPUs in the miner settings you know which one it is, instead of trying over and over until you find it. (Without distinguishing between AMD, NVIDIA and in the future INTEL)
Useful cases:
If you have a rig with AMD and NVIDIA GPUs mixed.
When you want to mine different coins in the same rig, for example >=4GB or >=3GB cards, LHR cards that are not that profitable with ETH.
To mark each gpu to know for example, which cards did overclock better, which one/ones are faulty, to compare 2 equal gpus but one has a flashed bios, etc.