http://bugs.winehq.org/show_bug.cgi?id=13486
--- Comment #5 from Nico Kruber Nico.Laus.2001@gmx.de 2008-06-01 05:47:45 --- (In reply to comment #4)
On Windows, is your cpu also running at a lower frequency?
yes, power saving is active and adjusting core speed continuously (between 1000 and 2400 MHz)