Alex, first I got:
bash: echo: write error: Invalid argument

But then after I tried to pass it some more times it worked :S

Anyways with "high" it still only clocks up the mem clock.

# echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level
# cat /sys/kernel/debug/dri/*/radeon_pm_info
uvd    disabled
vce    disabled
power level avg    sclk: 30000 mclk: 135000

# echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level
# cat /sys/kernel/debug/dri/*/radeon_pm_info
uvd    disabled
vce    disabled
power level avg    sclk: 30000 mclk: 15000

Where can I check the levels that "high" is supposed to clock to?