I read sometime that 3GB can mine ETH only if they are combined whit 8GB gpu, is this still true?.
The only GPU i could consider being rasonable would be 1060GTX. other old cards dont put the MHS for the power draw.
https://minerstat.com/dag-size-calculator4.547 GB how are you going to use on a graphics card with 3 GB of RAM?
Use your 3gb graphics cards to mine Ethereum Classic de mid next year.
In June 2022, you will be able to repeat the combined mining method 8 GB + 3 GB to slightly extend the possibility of mining on 3 GB video cards.