Yeah,offset gets added to the default voltage,keep your eye on the stress load CPU v,anything under 1.4v is safe and 80 to 85c load stress temps,Max safe for qpi/vtt is 1.4v but you won't need that much
I reckon you might need anything from 1.3v to 1.35v load CPU v for 4ghz
I reckon you might need anything from 1.3v to 1.35v load CPU v for 4ghz