Great, so much lessons to learn here like never jump into anything that you know too less about, GPU with 2GB and 3GB are struggling to keep up thanks to ETC mining even 4GB can't be use to mine ETH again.
The only thing I use on >3GB cards like the GTX 1050 OC, is Raptoreum mining now. They make the equivalent of an i5 processor consistently and increase profits on the CPUs that I have mining. You could use it for ETC too.
So to further the point, greater than 4GB cards are not useable for mainnet ethereum mining, but are far from useless.