I have a Batch 1 Z9Mini running at 718 frequency (15.6KH @ 335W).  Maybe I can go higher, haven't tried.  Fan noise is fine even outside a supression box I made of pine and plush carpeting.

What benefits might I see with this firmware?  Voltage tuning?  Finally be able to run on Nicehash?
You say it's a basic mod with no Dev fee.  Just weighing benefits and risk.  Thanks for your help.