-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Guenter On 24.01.2014 15:40, Guenter Roeck wrote: > One interesting experiment might be to check what happens if you > set pwm2_auto_point1_pwm to a value between 1 and 4. If that > results in the fan running at full speed, we have some indication > that either the fan or the board hardware is causing this > behavior. Same result. If the calculated pwm value (pwm2) is smaller than 5, the fan spins up to maximum rpm. Today I disassembled my other pc (on which I'm able to completely stop the fan by reducing the pwm value) with the same model of CPU fan (Arctic Freezer 13) and hooked it up to the ASUS H87-PRO. The fan looks a little bit different than the other, but the values are almost the same. Arctic Cooling Freezer 13 (Old Model) - ------------------------------------- pwm2 rpm 1 2064 2 2064 3 2064 4 2064 5 393 6 272 7 398 8 187 9 196 10 423 11 493 20 486 30 630 40 730 50 912 60 1060 70 633 90 859 128 1251 255 2261 Almost the same result with the original fan Arctic Cooling Freezer 13 (New Model) - ------------------------------------- pwm2 rpm 1 2257 2 2253 3 2261 4 2180 5 551 6 451 7 407 8 370 9 366 10 370 11 392 12 411 13 433 60 1203 70 1355 90 1580 128 1836 255 2260 Then I took the boxed Intel fan and hooked it to the ASUS Board. Intel Boxed Cooler - ------------------ pwm2 rpm 1 976 2 974 3 972 4 976 5 978 6 972 7 975 8 973 9 973 58 976 59 1005 60 1018 61 1021 70 1072 90 1184 128 1393 255 1953 And now the interesting part ;-) Connected the original fan to CHA_FAN2 (controlled by pwm3) Arctic Cooling Freezer 13 (New Model) - ------------------------------------- pwm3 rpm 1 0 2 0 3 0 4 0 5 0 6 0 50 0 55 430 60 512 70 633 90 859 128 1251 255 2261 On this pwm3 output I'm able to let the fan spin down until it stops (around pwm 50-55) So it seems that the CPU fan output is somehow special - but I guess only ASUS knows how exactly and why. - -- greetings Mathias -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlLlMI4ACgkQnfTEjDUZ2fOXxgCfeIyv7NXNZLm4gHc9a+bFEF/0 cnkAnAvThiVg2teiDw5mXxelg+gfNeR9 =2BkY -----END PGP SIGNATURE----- _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
