Comment on Controlling fan with Thinkfan on Lenovo Thinkpad R61 on Debian GNU/Linux (adjusting proper fan cycling) by Martin Roth.
Just a note since I haven’t seen this anywhere else:
Setting the fan level to 64 boosts the speed on my W500 up to 5000 RPM and actually cools down my machine.
Here are the sensor values I’m currently using:
(3, 0, 40)
(5, 35, 60)
(7, 54, 68)
(64, 65, 32767)