Thanks Joshwaa, atitweak works.
Thanks mc_lovin, yeah there was a file and a little note, i deleted it - afterwards it worked
noOCGPU1
mother disabled overclocking on this GPU due to a defunct phoenix process at Thu Jun 14 13:14:02 2012
Also when using atitweak make sure to always use "-P 2" that way you do not mess with the wrong power level.