Catalsyt was 10.8 when i wrote the first post, just updated it to 11.3.
Still no result, when i turn on the miner GPU clock was 400 and Memory clock was 1000. and it wouldn't go up to the default values of 725/1000.
So i tried turning off firefox and firing up the miner, values went to 725/1000 and i got 240 MHash/s.
Seems firefox with flash f**ks this up. :/ if anyone knows how to fix it...
as for lowering the mem clock i get better temps and lose very little MHash/s correct?
You shouldn't even be losing Mh/s. I for example GAINED quite a few Mh/s! and power consumption and heat go way down.
In firefox, go in options and untick the "enable hardware acceleration when available"