So, this might sound rather random, but have had similar problems in the past with certain programmes causing my GPU to go into a semi-overclocked state. Currently, my 7950 runs at 300mhz GPU and 150Mhz Memory when it's in the underclocked state. However, when I open iTunes (no visualisers or anything) the GPU clocks up to 500mhz GPU and 1250Mhz Memory, resulting in it idling at ~50C.
This seems to have started happening within the last couple of updates or so and would much appreciate it if someone could help me out with this!
Current driver: 16.8.1