GeForce RTX 3060 Laptop GPU
cuBitCrack.exe
-b 82 -t 256 -p 2096
704.18 MKey/s [00:00:25]
Do you mean build-in card or eGPU?
I have eGPU RTX 3060 and with these settings I have 800Mkey in peak, stable 780-790:

I use
https://github.com/PawelGorny/BitCrack-3000 (forked from Nonatether)