Man, please, try to put some sanity in what you're doing. How do you think it is possible to run 550/520 when 720/520 is assumed stable, I even changed KP frequencies because of that. Meh. Otherwise 33 for 500 is a little high, I agree, but not much to be done here, some devices pretend they can run 500/30, but actually cannot, that is why there is a little voltage boost for 500. In short, don't try some exotic frequency profiles with SR enabled, it won't work. Use dsp profile and if it is not stable re videos, move DSP overclocking to higher frequencies(look at knobby's posts). Anyway thanks for your help testing SR.