I've mined on NiceHash for a couple years off and on, and currently have 6 P104-100's and a 1060 mining for me. According to the calculator I should be getting around $24 a day. In reality, my payouts to my NH wallet are right about $10 a day. I believe it is taking into account my electric cost, but even so, it's guess as to what I should be earning is WAY off.
All 7 GPUs are always mining BeamV3 through NBMiner 36.1.
Is it the miner program and algorithm affecting my profits, or is the calculator just plain wrong?
I'm guessing your miner is performing worse due to the limited 4gb memory on the GPUs, If you are up for some modding you can looking into bios modding those cards to unlock the extra 4gb onboard, if you can't you will be stuck with other algorithm like BitTube (cuckarooo29b Algorithm) which can give you 3.5$ per your graphics card right now, here is a good calculator
https://minerstat.com/hardware/nvidia-p104-100