i finally got an X201 over my X200s (i just couldn't get the MHD4500X to work), swapped the nice X200s WXGA+ Screen over to the X201 and made a MyHack. Install worked okay-ish.
i5-520M, Intel HD Graphics, 60 GB SSD, 1440x900 Screen. Fresh thermal paste, clean and dust free.
With Windows 7/8.1 the Fan isn't even on most of the time. The CPU Temp is barely cracking 50°C while just surfing the Web, with getting up to about 55°C. Then the Fan kicks in on a very low speed until it's down to 50ish°C.
With OSX 10.9.3 the Fan is running all the time, but on a very constant speed (from the noise, i would say about 2500-3500 rpm, so about 45-50%, max. RPM is 6900). The CPU Temp is hovering about 55-60°C all the time.
SpeedStep seems to be working, because HWMonitor shows it clocking down to 1.2 GHz. But since 1.2 GHz are enough for light surfing without any "effects" and some text writing...i would love to "pin" the CPU to 1.2 GHz...
So bottom line is: Is it possible to control the Fan and/or clocks? It looks like that the Governor is clocking up pretty fast. CPUThrottler doesn't work with my installation - and i have no idea where to start.
So maybe someone can give me some tips^^