Thanks for confirming the AP-14/15's aren't PWM, and do under-volt well!

Quote Originally Posted by Conumdrum View Post
AP 15/14's etc are NOT PWM. 3 Pin.
So you need the standard Mosfet etc on the mobo or controller to handle the startup current of each. Yes, they are directly controlled by the raw voltage applied to the fan, they have no PWM hardware on the fan. And they do undervolt well. So for voltage control they have to be connected to the voltage control device, branching the power wires to the PSU will ensure 100% RPM all the time, no matter what you want to do with the RPM sensing wire.

I know the GT15's are about .3 amps on startup. Adjust accordingly for the 14's. Mobos have a higher amp CPU connector, some mobos are 3/4 pin and allow either type to be used. Most are PWM 4 pin I 'think' tho. 1 Amp is the common accepted CPU header max allowed, the others? .5 Amp.
According to Scythe's global site, peak draw for AP-15 is 0.083, & AP-14 is 0.049.
YTD the max. draw for each of my headers, but assuming you're right & the CPU_Fan PWM header is 1amp & the other 3 are 0.5...

Then that means one of the 3-pin headers will comfortably support up to 4x AP-15's at their top speed (0.332).
And the 2nd 3-pin will comfortably support up to 6x AP-14 at their top rated speed (0.294).

Think of this.... Using the mobo and all the availible fan headers on the mobo makes a absolute mess of wiring.
Get a solid quality fan controller, make do with one less slot.
1-6 GT14s spread between two mobo headers? Nope....
Sorry I didn't read every bit of the post you made, but maybe this will help.
Actually it's 2-4 AP-15's for one header & 2-6 AP-14's for the other, so as many as 10x AP15/14's between the 2x 3-pin headers.
Then we've got up to 2x PWM fans >3000RPM (prolly the 5400's) sitting on the 2x PWM headers. So yeah, prolly quite a mess!

I probably will get a dedicated controller in the coming months.
I just want to make sure it's do-able with my MB only in the meantime.

It certainly did help, and was most appreciated!