Hi, the issue is maybe from your overclock settings. You missing to post the picture of the settings and stats of cards which keaton_hiveon asked.
To use “locked core clocks” which differs from “core clocks”
Your core clock should be above 500 and divisable by 15 without reminder. Take a look here
Which miner you using?
For t-rex miner check FAQ · trexminer/T-Rex Wiki · GitHub
If you using different miner search for their FAQ.
Im using t-rex. Here are my stats and settings. But have in mind that different gpu brands - different settings - mean not exactly the same…
Im using power limit for 3090 because still don’t have ups But Im above the power needed for the current overclocks. My “farm” is 2 gpus only, home mining - and Im expecting not perfect power from the wall.
And to not forget to mention - In front of cards Im using additional fan on full speed