Hey Nemo &QuintLeo
thanks for sharing your knowledge.
I have to invalidate my 150W statement, I just realized there is a power monitoring in afterburner.
I tweeked around a bit and made some observations:
* Reducing the Core Clock can lead to "unstable" graph, could this damage the card when used over a long time?
(almost got a heartattack at this point because as I wrote it I got black rectangles all over the monitor

)
* Increasing Memory Clock results in a higher hashrate by higher power consumption
* Reducing Power Limit can limit and decrease the hashrate
I have my PC plugged in into a power analyzer. Everytime I change the Power Limit for 5%, the power analyzer changes for about 9W but afterburner just changes about 3-4W. I don't know which to trust more

Also if I set the Power Limit to 60% it doesn't really matter what I change on Core and Memory Clock, it feels like the hashrate is capped by the 60%. If I set it to 65% with same clocks the hashrate increases.
I played around for about 3 hours now, but I still didn't find my best suitable settings, I have roughly ~28Mh/s @85-90W now

I tried with under 60% Power Limit, -200 Core clock and increasing Memory Clock but this somehow just got me around 25Mh/s. After a while with MemClock on +650 I got graphic issues so I'm not comfortable with this at the moment.
Settings / MinerCheers, Zuop