is my GPU broken (sapphire r9 290)?

i recently built my own pc, it was all going fine until i booted a game, suddenly my sapphire r9 290 comes alive with bad coil whine, shaky grey see-through lines moving horizontally across the screen but the games still ran fine. recently, its getting louder and louder and hotter and hotter at idle and ive had 4 blue screens, did i mention that ive only had this 4 or 5 days? driver issue or something more, what do you think?