LHR guide
"T-Rex has partial LHR unlock functionality for 30xx GPUs mining ethash (~70% of full hashrate).
In order to enable LHR mode, you need to explicitly tell the miner which GPUs are LHR and which are not. This is done by specifying --lhr-tune parameter which takes values from 0 to 8:
0 - disabled (use for non-LHR cards)
1 - lowest hashrate, low chance of LHR lock
4 - recommended starting value for most LHR cards
8 - highest hashrate, high chance of LHR lock
It can also be set for each GPU separately, e.g. --lhr-tune 0,0,4,0 - this will tell the miner that the third GPU is LHR and that it needs to start with the tuning value of 4, while the rest of the cards are non-LHR.
HiveOS equivalent would be "lhr-tune": "0,0,4,0" "