@Andreas Wolf

Please someone say he didn't really divide 30 by 60 to come to his conclusion. Given my math isn't completely off I'd calculate 1-(1.3/1.6) and end up with a 20% relative power saving.

He probably did . In fact your math is correct and the precise relative power saving is 23%.

[ Edited by Krashan 10.02.2012 - 06:32 ]