Case Fan sleep mode issue

[omega211]

I am having some issues with my case fans after the PC wakes up. The rear fan (connected CHA_Fan 4) spins up, but stops, LEDs stay on. The 3 other fans connected via hub on CHA_Fan 2 spin up, but slow down, LEDs dim.

I've attempted to put load to trigger fan spin, but nothing happens. If it's from a fresh boot, no issue. Fans speed up based on temperature.

Also re-installed Windows 10, just in case.

All fans are PWM and the BIOS is configured for each fan as PWM.

If I switch in the BIOS the fans to DC, there's no problem, it's just noisier.

Specs:
Case: Deepcool Genome 2 (built in water cooling)
Processor: Intel Core i5 6600K
Mobo: Asus Z170-A - Latest Firmware applied
Memory: GG.SKILL Ripjaws V 16GB (2x8GB) DDR4 3000MHz C15 Dual Channel Kit (F4-3000C15D-16GVRB)
GPU: EVGA GTX1080 FTW
SSD: Samsung EVO 850 - 500GB
PSU: EVGA SuperNOVA 650 P2 650W
OS: Windows 10 64-bit

 

[Knuggern]

Try downloading "AI Suite 3" from ASUS website (just search for you motherboard and go to support) and tune your fans using Fan Xpert, see if that works.

 

[JackNaylorPE]

That's weird .... when you try and run a DCV fan too slow in the past, it would sometimes not start up as the voltage required to keep it going was less than what was needed to start it. If ya set speed too low, it couldn't get going. Newer control schemes start the fan and then drop voltage to prevent this.

PWM fans OTOH always have 12 v so this is not an issue.

The only thing I can fathom that fits what you describe is a "feature". FanXpert has a feature whereby you can set the fans to turn off if the fan curve you have set up goes below a setpoint you pick. For example, I have mine set to turn off if the fan curve wants them to spin slower than 350 rpm.

Did you are the system builder set this up this way ? Is AI Suite installed ? Or if it was and then portions shut down / removed, check task manager and see if AsusFanControlService.exe is running

 

[omega211]

Try downloading "AI Suite 3" from ASUS website (just search for you motherboard and go to support) and tune your fans using Fan Xpert, see if that works.

Thanks, I had that installed before and removed it as I thought maybe it was causing the issue. I'll try it again though.

 

[omega211]

That's weird .... when you try and run a DCV fan too slow in the past, it would sometimes not start up as the voltage required to keep it going was less than what was needed to start it. If ya set speed too low, it couldn't get going. Newer control schemes start the fan and then drop voltage to prevent this.

PWM fans OTOH always have 12 v so this is not an issue.

The only thing I can fathom that fits what you describe is a "feature". FanXpert has a feature whereby you can set the fans to turn off if the fan curve you have set up goes below a setpoint you pick. For example, I have mine set to turn off if the fan curve wants them to spin slower than 350 rpm.

Did you are the system builder set this up this way ? Is AI Suite installed ? Or if it was and then portions shut down / removed, check task manager and see if AsusFanControlService.exe is running

Thanks. I did have AI Suite 3 installed. I removed it thinking it caused the issue with the fan. After I removed it I did a clean-up to ensure the AsusFanControlService.exe and other Asus services were stopped and removed. Not the best uninstall.
Anyway, I'll try it out again. It's very strange.

I should also mention, that I reset all my CMOS to ensure that I hadn't accidentally changed a setting.

I'll give AI suites a try again and see how that goes.