Question PWM Fan Vs. DC Fan Cha Fan Operation

[MasterBlaster22]

PWM Fan Vs. DC Fan Cha Fan Operation

This PC is a micro atx so it only has 1 Fan Hub on the Motherboard that is dedicated to CHA fans. It can be set in the Asus Bios in Q Fan control to operate as DC or PWM. I have a cord comming out the CHA fan header to a 5 Way Splitter.

When it is set on DC, the whole machine has like a "power wave," everything runs up to full speed and then drops down to slow and then speeds up over and over in about a 20 second interval.

I don't want it to do that. Could that be the reason that my last PSU died in 2 months?

I just got a new PSU but it is crappy. This is when I am discovering how the DC vs. PWM options change the way that the whole rig, kinda bogggs down, then speeds back up.

It started dying completely in the middle of things too! Black screening to nothing, then you could restart it like 10 mins later and get back to normal until it would black screen of death again.

 

[CountMike]

PWM Fan Vs. DC Fan Cha Fan Operation

This PC is a micro atx so it only has 1 Fan Hub on the Motherboard that is dedicated to CHA fans. It can be set in the Asus Bios in Q Fan control to operate as DC or PWM. I have a cord comming out the CHA fan header to a 5 Way Splitter.

When it is set on DC, the whole machine has like a "power wave," everything runs up to full speed and then drops down to slow and then speeds up over and over in about a 20 second interval.

I don't want it to do that. Could that be the reason that my last PSU died in 2 months?

I just got a new PSU but it is crappy. This is when I am discovering how the DC vs. PWM options change the way that the whole rig, kinda bogggs down, then speeds back up.

It started dying completely in the middle of things too! Black screening to nothing, then you could restart it like 10 mins later and get back to normal until it would black screen of death again.

5 fans on one header ? Ere they identical ?
Those headers are rated for 1A so you are probably exceeding it so not enough power when they are at high speeds. Check power on all fans and add them up. If over 1A you need a powered hub. It isn't a good idea to have different fans on one header because they send conflicting speed signals to controller.