I got curious and tested this on my new setup aswell.
I use "vanitysearch.exe -stop -gpu bc1q....." and I'm getting 2200 Mkey/s on my 4060TI paired with an i7 14700k (undervolted).
However my CPU is at 100% usage and my GPU shows 1-2% in task manager. Is this normal or is my gpu not putting out enough work here?
I just tested that with mine and task manager shows ~100% for both CPU and GPU. I haven't changed the voltage settings on my CPU though - the only thing I've done is to flash the mobo to the latest bios before I started playing with it.