R9 280: High idle temps?

Hey so I currently have a Club 3d r9 280 and I noticed that when I now boot my PC my GPU idles at 50°C. Usual idle temps before were around 32°C

I recently updated to AMD Crimson driver v15.12 (from 15.11) and I noticed my idle frequency changed from 300mhz to 500mhz after updating, so I'm assuming this is the reason for my high idle temps. If so how can I lower it back to 300mhz on idle??

BTW my load temps have not increased (OC to 1100mhz) peak at the usual 74°C