Will it be slower or i just doesn't work? I want to know before I bother downloading the miner, setting a worker and so on.
Depends on the card... it definitely won't work with a 290 or 290X for sure
im talking about memory ram. They meant GPU ram? or what. I have a R7850
They're talking about system ram as well. I havent tried 7850 or 280x with a 2GB stick. But scrypt-n definitely needs more system RAM than plain scrypt. Anyway 2GB is too low even then... it willbe mostly used by the OS. You will need Windows 7 minimum for the drivers to detect newer R9 cards, and I the 280x is a renamed 7850 if im not mistaken.