Can we use "persistent_memory" in the CMD Line?
No, but that parameter is anyways only used when old mode is enabled, and i think it became.. useless
Doc, do we know why TR has such different power consumption compared to other miners?
Are you working on this? Well, I hope something similar can be implemented in your miner too

We all know why, but we - the others - who don't have enough knowledge with GCN asm, probably can't do much atm.