yes dk75, i have 4 levels but i'd rather be satisfied with one working level
i tried to overclock the lower two levels to get full performance but got nothing but artifacts (yes i set the voltages and everything right, at least i think so. there also was a thread on the mvktech forums that described it pretty well). according to the notebook producer the card they put into the notebook (9600 gt) is an mxm module, but the vbios is somehow linked to the system bios, which might be an explanation for the resulting artifacts.
btw. could it be that this also causes the powermizer issues we all experience?