Just purcahsed a new GTX 1080 Nvidia for gaming.
After learning aobut crypto mining, I have put it to use mining Ethereum when I am not playing games.
There are a lot of videos out there showing you what to do.
The basic steps are
- Create and Ethereum wallet
I used https://www.myetherwallet.com/
- Download a program to do the mining. I used Claymore's miner
https://bitcointalk.org/index.php?topic=1433925.0
- Configure the program to connect to a mining pool and with you Ethereum wallet.
I used https://ethermine.org/
- Run the program.
- Wait for the payout.

You ahve to consider the electrcity usage.
There are a few calculators that show the returns and profits.
https://www.coinwarz.com/calculators/ethereum-mining-calculator/?h=25.00&p=600.00&pc=0.18&pf=1&d=1760446074597330&r=5.00000000&er=0.08165799&btcer=4230.55260000&hc=0.00
https://www.cryptocompare.com/mining/calculator/eth?HashingPower=25&HashingUnit=MH%2Fs&PowerConsumption=250&CostPerkWh=0.18