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. Maby in hive i must use 11.4 cuda , i dont know, but it not work ....
Now I will turn it on on cuda 11.4 And I will throw off the test result in 2-3 hours here. Cuda 11.5 doesn't work on Hive os, probably because autotuning always chooses core 1 for my cards on any settings.
I will say that I consistently get over 135 MH/s poolside on my 3090 FTW running for 24hr + at 2miners, with the recent update, I've seen a good boost on my AMD cards, especially in Windows (65-68 MH/s) over long stretches as well. Setup is key and I have no experience with the 3080s, but with the 3090, intensity at 3801 and GPU running no less than 1630 MHz (which keeps the voltage at a set point that seems to work well for throughput), and memory speed to whatever you can get as a stable setting and it's important to force p0 state to keep any hiccups from scramming the machine).