Change the fan settings and or clean out the dust from the card if there is any.
I had the same problem for a long time. The card was incredibly loud! Then I discovered that my R9 290 card (gigabyte windforce) had a tiny physical switch on the side of the card dubbed "quiet" and "performance" mode. For some reason mine was in performance mode. After switching to quiet mode the noise levels were much more bearable while practically maintaining temperature and fps.