i currently have an r9 280x and my fps is stuck on 60, i've turned the fps in game to unlimited but still it never shifts from 60,its not bad its just slightly annoying that it doesn't go above it. the core speed is at 1130 MHz
Screen tearing may indeed occur, but if you play first person shooter games like battlefield for example you will notice much less mouse lag...i'd suggest to always have v-sync off for FPS