| | 783 | |
| | 784 | Additional info about PWM on the AS99127F by Marcansoft: |
| | 785 | |
| | 786 | I've been fiddling around with the (in)famous 0x59 register and |
| | 787 | found out the following values do work as a form of coarse pwm: |
| | 788 | |
| | 789 | 0x80 - seems to turn fans off after some time(1-2 minutes)... might be |
| | 790 | some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an |
| | 791 | old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attemp at Qfan |
| | 792 | that was dropped at the BIOS) |
| | 793 | 0x81 - off |
| | 794 | 0x82 - slightly "on-ner" than off, but my fans do not get to move. I can |
| | 795 | hear the high-pitched PWM sound that motors give off at too-low-pwm. |
| | 796 | 0x83 - now they do move. Estimate about 70% speed or so. |
| | 797 | 0x84-0x8f - full on |
| | 798 | |
| | 799 | Changing the high nibble doesn't seem to do much except the high bit |
| | 800 | (0x80) must be set for PWM to work, else the current pwm doesn't seem to |
| | 801 | change. |
| | 802 | |
| | 803 | My mobo is an ASUS A7V266-E. This behaviour is similar to what I got |
| | 804 | with speedfan under Windows, where 0-15% would be off, 15-2x% (can't |
| | 805 | remember the exact value) would be 70% and higher would be full on. |
