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Asus AI Suite caused dead case fan

Joined
Aug 27, 2017
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Processor AMD Ryzen 3700X
Motherboard Asus X570 TUF
Cooling Cooler Master Ml240l v2 AIO
Memory Corsair 32GB DDR4 3200Mhz
Video Card(s) Nvidia RTX 3090 FE
Storage 2 x NVME 1TB SSDs
Display(s) BenQ 34" 1440p LED
Case Lian Li o11 Dynamic Full Tower
Software Windows 11
Running an Asus TUF X570 motherboard and had Asus AI Suite which includes Xpert Fan.

I have a 3 way fan splitter connected to CPU_OPT header on motherboard and never had any issues with it, but when playing with my RPM in Xpert fan by setting the CPU Fan to 100% RPM ; it caused one of fans connected to CPU_OPT to stop spinning. I'd seen it do this in the past and I would usually just low the fixed rpm again and the fan would begin spinning again, but this time it did not start spinning.

I always thought it very strange that changing the CPU fan (which I can tell my the fans on my AIO were spinning up faster so I know I'm changing the correct fan speeds) would impact the CPU_OPT fans or at least this one. On reboots and cold boots of the machine, the fan spins up for a few seconds then dies as soon as it starts booting the BIOS. The LEDs on the fan are still lit just that the fan won't spin after booting.

I've tried:
- Resetting BIOS
- Uninstalling AI Suite and resetting BIOS
- Testing the 3 way fan splitter to ensure all splitters are working (they are)
- Moving the fan which has the issue to its own dedicated CHA_Fan header or directly to CPU_OPT and not sharing with the others

None of the above get the fan to spin again - is this fan dead?

Its one of these:

Corsair HD Series, HD120 RGB LED, 120mm High Performance Individually Addressable PWM Fans​


 
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System Name daily driver Mac mini 2018
Processor Intel 3.2 GHz Core i7 (I7-8700B Coffee Lake - 6 cores, 12 threads)
Motherboard Apple proprietary
Cooling Apple proprietary
Memory 16GB 2666 MHz DDR4 PC4-21300 SDRAM
Video Card(s) integrated Intel UHD Graphics 630 + Sapphire Pulse Radeon RX 580 8GB (via Sonnet eGPU)
Storage Apple proprietary 1TB SSD + various external HDDs
Display(s) LG 27UL850W (4K@60Hz IPS)
Case Apple proprietary
Audio Device(s) Apple proprietary
Power Supply Apple proprietary
Mouse Apple Magic Trackpad 2
Keyboard Keychron K1 tenkeyless (Gateron Reds)
Software macOS Monterey 12.6.1
Benchmark Scores (I have a number of desktop Windows PC builds but I use the Mac the most.)
The fan is probably dead since you've already tried it on a separate CHA_Fan header by itself.

The fact that you used ASUS AI Suite is probably purely coincidental. It's not like the software is going to send 36V of power to the fan by mistake (which isn't even available from your PSU).
 
Joined
Aug 27, 2017
Messages
36 (0.02/day)
Processor AMD Ryzen 3700X
Motherboard Asus X570 TUF
Cooling Cooler Master Ml240l v2 AIO
Memory Corsair 32GB DDR4 3200Mhz
Video Card(s) Nvidia RTX 3090 FE
Storage 2 x NVME 1TB SSDs
Display(s) BenQ 34" 1440p LED
Case Lian Li o11 Dynamic Full Tower
Software Windows 11
My question is if the fan is dead, why does spin on boot? It spins normally for like 2 seconds then BIOS has finished posting and bam it dies down.
 
Joined
Jun 21, 2021
Messages
1,780 (3.33/day)
System Name daily driver Mac mini 2018
Processor Intel 3.2 GHz Core i7 (I7-8700B Coffee Lake - 6 cores, 12 threads)
Motherboard Apple proprietary
Cooling Apple proprietary
Memory 16GB 2666 MHz DDR4 PC4-21300 SDRAM
Video Card(s) integrated Intel UHD Graphics 630 + Sapphire Pulse Radeon RX 580 8GB (via Sonnet eGPU)
Storage Apple proprietary 1TB SSD + various external HDDs
Display(s) LG 27UL850W (4K@60Hz IPS)
Case Apple proprietary
Audio Device(s) Apple proprietary
Power Supply Apple proprietary
Mouse Apple Magic Trackpad 2
Keyboard Keychron K1 tenkeyless (Gateron Reds)
Software macOS Monterey 12.6.1
Benchmark Scores (I have a number of desktop Windows PC builds but I use the Mac the most.)
My question is if the fan is dead, why does spin on boot? It spins normally for like 2 seconds then BIOS has finished posting and bam it dies down.

Beats me. Maybe the fan's PWM circuitry failed.

At power up, it's probably getting the full 12V DC. Once it passes POST, the UEFI BIOS tells it to slow down per the programmed fan curve and maybe the PWM control signal (pin 4) is being misread by that particular fan's PWM circuitry to stop completely.

I suppose you might be able to test this by configuring a CHA_Fan header to run as DC Control and see if the fan starts spinning. But ultimately you don't really want to run a 4-pin PWM fan in 3-pin DC mode, do you?

For sure, you can't blame AI Suite while it's running in the UEFI BIOS, i.e., before booting any operating system (Windows, Linux, FreeBSD, whatever).

Regardless of the underlying reason, that unit isn't working as advertised. Have the retailer replace it if that's an option or RMA it.
 
Last edited:
Joined
Aug 27, 2017
Messages
36 (0.02/day)
Processor AMD Ryzen 3700X
Motherboard Asus X570 TUF
Cooling Cooler Master Ml240l v2 AIO
Memory Corsair 32GB DDR4 3200Mhz
Video Card(s) Nvidia RTX 3090 FE
Storage 2 x NVME 1TB SSDs
Display(s) BenQ 34" 1440p LED
Case Lian Li o11 Dynamic Full Tower
Software Windows 11
It is very strange and I had assumed it would spin in BIOS and die in Windows as I suspect AISuite was the culprit but I have seen others mention that to undo any change from AISuite uninstalling the software alone did not revert its changes to fan speeds, they had to reset BIOS too which implies it’s configuration is deeper than simply the application layer. The issue only became present when using AISuite to fix the rpm at 100% ; within a second or two the fan stopped spinning and couldn’t get it going again thereafter - so it’s one HELL of a coincidence if that’s all it is lol…

open to any other suggestions or comments , I may just try setting to DC for testing anyway, but inclined to hear what you all think
 
Joined
Jun 21, 2021
Messages
1,780 (3.33/day)
System Name daily driver Mac mini 2018
Processor Intel 3.2 GHz Core i7 (I7-8700B Coffee Lake - 6 cores, 12 threads)
Motherboard Apple proprietary
Cooling Apple proprietary
Memory 16GB 2666 MHz DDR4 PC4-21300 SDRAM
Video Card(s) integrated Intel UHD Graphics 630 + Sapphire Pulse Radeon RX 580 8GB (via Sonnet eGPU)
Storage Apple proprietary 1TB SSD + various external HDDs
Display(s) LG 27UL850W (4K@60Hz IPS)
Case Apple proprietary
Audio Device(s) Apple proprietary
Power Supply Apple proprietary
Mouse Apple Magic Trackpad 2
Keyboard Keychron K1 tenkeyless (Gateron Reds)
Software macOS Monterey 12.6.1
Benchmark Scores (I have a number of desktop Windows PC builds but I use the Mac the most.)
You know, if AI Suite was regularly killing fans (not sure how it would do that), I think the Internet would be flooded with complaints about that danger. It's not like the X570 chipset nor AI Suite shipped last week.

I stand by my opinion that it was mere coincidence.

I own a ROG Strix X570-I (see my System Specs) and for sure I have played with AI Suite from time to time without ill effects to the fans in my current build nor in previous builds where I used that motherboard. I have two ASUS B550 motherboards as well in other builds.
 
Last edited:
Joined
Aug 27, 2017
Messages
36 (0.02/day)
Processor AMD Ryzen 3700X
Motherboard Asus X570 TUF
Cooling Cooler Master Ml240l v2 AIO
Memory Corsair 32GB DDR4 3200Mhz
Video Card(s) Nvidia RTX 3090 FE
Storage 2 x NVME 1TB SSDs
Display(s) BenQ 34" 1440p LED
Case Lian Li o11 Dynamic Full Tower
Software Windows 11
Fan is working again, reseated the CPU and when booting back up fan is operational again.
 
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Check how fan is controlled (PWM or DC).
 
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