So I have a strange anomaly... running 1.21 on 3 different rigs, 2 4x 1080ti and a 6 card rig mixed with 1080/1080ti.
The 4 card rigs are pretty much identical, trying to run on ZPool.
One 4 card rig starts up and gets a whole bunch of low diff shares and then gets a diff update and slows down, but finding bigger shares, all is good and right in the world of mining.
The other 2 rigs described, both start up the same, but never get a diff update and continue mining the lowest diff indefinitely...
Reboot doesn't help, newest drivers installed on all machines, I have never noticed a difference in any of these rigs until this, I'm afraid to turn off the one that's working, lol.

Anyone have any suggestions?