i am going to oc my q9550 from 2.8 to 3.6-3.8ghz and when i look at cpu z atm it shows 2000mhz with 6x multiplier i have been told this is the speed step
is it better to turn this off or not and why ?
More aboutq9550 disable speedstep
Problem with speedstep is that its also changing voltage and if you already changing default value it could (and most likely will) limit your maximum overclocking and it could also cause stability problems.
I turn it off. Then after I have arrived at my OC settings, I turn it back on. YMMV.