I spent about 4 days on tests,
Which version did you test. Which mining pool did you test? Let it run for 5000 shares. TBM should be faster if you configure it correctly.. What speed are you getting in the miner window. Screenshots please.
I tried on 2miners , on a 12x3080 rig, Hive OS cuda 11.5 driver 495.46 cuda 8 xint 3108 , I have 1321mh in the miner window. Average per pool per day 1.24 ghs. It works well for the first hour, then it starts to fall behind. I can put it for you again for a test for a day, so that you can be convinced of this yourself.