Did some initial tuning and this rig is performing well now:



"pool side":



I was at 525 MH/s before using T-Rex, so this is an impressive improvement of 140 MH/s.  Like getting a 3090 for free!

My 3080Tis are now more efficient than my 3090s, which are all doing around 122 MH/s @ 300 Watts.