I am experiencing this problem with my processor.
After a fresh Windows 7 Ultima 64 installation it started to work really slow.
Ive made tests and the results were very bad (I let my benchmark results in the following images).
I also tested it on Ubuntu and the results were the following:
This Machine 1600 MHz 3,016
Intel(R) Celeron(R) M processor 1.50GHz (null) 26.1876862
PowerPC 740/750 (280.00MHz) (null) 172.816713
This Machine 1600 MHz 610,282
This Machine 1600 MHz 1,423
Intel(R) Celeron(R) M processor 1.50GHz (null) 8.1375674
PowerPC 740/750 (280.00MHz) (null) 58.07682
This Machine 1600 MHz 4,032
This Machine 1600 MHz 0,849
This Machine 1600 MHz 5,791
Intel(R) Celeron(R) M processor 1.50GHz (null) 40.8816714
PowerPC 740/750 (280.00MHz) (null) 161.312647
The Windows experience gives me a 5.6 out of 7.9.
The curious thing is the i checked on my BIOS and frecuency is 3,302 GHZ for all the cores.
Any ideas? This is really frustrating ... thanks in advance!