HW monitor displays 3 PWM fans running at 0%, but i have 4 fans, 3 intake fans at the front and 1 fan at the back. There is probably some cable to make sure is plugged in on the motherboard. Fan speeds should be determined by your fan control not by the mode it is controlled. Whether it's PWM or DC shouldn't make much difference, since fans need 40% voltage to spin, a 1000rpm DC controlled fan can't go slower than 400rpm, while PWM fans are controlled by the separate PWM signal while staying @12V all the time and usually have a speed range of 20-100%.
I've been trying to figure this out for much of the past weekend, and cannot seem to get my PWM fans to drop down in speed.
This is a freshly built system, and the motherboard is a Supermicro X11SSL-CF. The case fans are all aftermarket Noctua PWM models. I have already issued a series of ipmitool commands in an effort to remedy the situation (commands taken from this page):
Set the lower limit:
Set the upper limit:
It does appear the settings have stuck as they are retained after reboots. Here are the stats as per 'ipmitool sensor list all'. Note that the current RPMs for the case fans (FAN2-4) are consistently at 1200 RPM, and the CPU fan (FAN1) consistently at 3100.
I have rebooted multiple times, and tried the motherboard's 'fan mode' in both standard and optimal.
I know the FAN1-4 ports are all in the same 'temperature zone', so maybe the CPU being at 3100 RPM is a potential cause? There's got to be something obvious I've missed. Has anyone got any ideas?
EDIT: I have discovered that rebooting the IPMI itself is necessary after using ipmitool. Do this by selecting the Maintenance -> Unit Reset menu item under the IPMI web interface. After this, my RPMs went way down to reasonable levels.
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Hello everyone, I recently did the ASUS 5 way optimization with my computer. Everything seemed to work fine (overclocked to 4.5ghz with 1.25V with 4690k), but I have a question about the fan optimization. All my fans are noctua: NF-S12B redux-1200 PWM > back exhaust NF-P14s Redux-1500 PWM > 2x front intakes and 1 back-top exhaust NF-P14r Redux-1500 PWM > CPU Cooler fan The thing is, after the optimization, all my fans had a minimum rpm of 0 except the back exhaust fan (NF-S12B redux-1200 PWM) and CPU fan. Why don't these fans have a minimum RPM of 0 like the other noctuas? This bothers me because when im casually browsing the internet, 3 of my fans are off (cpu temp is 30) but the back exhaust and cpu fans still run at their minimums of 300-450 rpm, and I would like to have all my fans turn off for complete silence. Adjusting the fan charts doesn't allow me to change the fans to 0 rpm for any temperatures (except the 3 that are able to do 0 rpm). Changing modes does not change anything either. Does anyone know if the AI Suite 3 permanently keeps the cpu and back exhaust fans running at a minimum, maybe for safety precautions? Thanks guys! Asus z97-A XFX 380x i5 4690k Windows 10