I had the same problem with my Amilo A1630, and unfortunately
Fujitsu-Siemens aren't being very helpful by not supporting Windows
Vista. The solution is to upgrade to a BIOS that supports CPU power
management under Vista, which the latest one from FS doesn't...
Fortunately you can get an updated BIOS from Uniwell at this link:
http://www.uniwill.com/UserDownload/258KA0/258KA0.php
I flashed my BIOS with version 1.05 from that site, and now my A1630
runs Vista Ultimate at full speed. Also the CPU controls in Power
Options have magically appeared and my CPU performance score in Vista
has doubled, which is a nice bonus!
I hope this helps... I'd be interested to know if it works for you too.
--
kaspar
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