Your R9 290 can be really dead.Sorry.
Stop panic and do one of two things:
1.Try your R9 290 on another PC
2.Try another powerful HQ PSU
1. Tried in another pc with an 800w psu with no luck
2. I'm using a seasonic plat 1000w psu so it should have enough juice. Highly doubt something's wrong with both psu's
Looks like it's time to go gpu shopping. Thanks for the reply regardles