Thanks a lot man!
Do you know how I would calculate how effective my GPU would be for different scrypt coins?
Is there a calculation with difficulty?
Scrypt? it's not profitable on GPUs for a long time already. the only coins worth mining on a GPU now are Ethereum and Monero.
Just Google "$coin mining calculator" and type your hashrate there, those sites make all the necessary calculations and give you the estimated profit for your GPU.
If you are looking for the hashrate on a particular card lookup the card on the web, something like "290X ethereum hashrate" would give you good results, you can start a miner and see the hashrate yourself.