Ok, so now im researching fans, and i must decide what i will get.

It looks like the aquaero 6 XT has all 4 fan Chanelles PWM capable, instead of only one compared to the aquaero 5.
I read the manual and i believe it says it can also run non PWM fans.

Now the way you tune down fan rotations is that you lower voltage.
The PWM fans are more exepnesive than their non PWM counterparts, and the way PWM works is that it gets some sort of signal from "the source" and this tones down the speed. I believe that by doing so the voltage remains at 12 V.

Now, since the aquaero lowers fan voltage, does that mean i dont need to get PWM fans at all, i will just control non PWM fans that would otherwise run at a fixed speed, through the controller by reducing voltage, right ?
I have read that PWM fans could also be controlled by reducing voltage, but that would lower their life span as PWM fans would be designed to run at the fixed 12V voltage. Is that really true ? Since Noctua pack a ULN (ultra noise adapter) to their PWM fans to reduce their rotation, which is basically a resistor, that would, i think reduce voltage so that the fan may run at a lower speed.

Does the aquaaero 6 XT do something extra, if the connected fan is PWM, or it is just there for the connections sake, so that you may be able to plug the fan ?
If the PWM function of the fan plays no role, since the aquaero 6 XT will control fans through lowering voltage, than one should get directly non PWM fans, since their cheaper, right ?

If i want to use a special fan that is only of PWM variety, then that should be the only reason to get a PWM fan, since it being PWM or not , it would matter for the Aquaaero 6, is that right ?

Since i will be using also be using Poweradjust 3, i have noticed this one only has a 3 pin fan connector, does that mean i wont be able to use PWM fans ?

ANd last question, is regarding connecting more than one fan to a single channell.
Apart from doing my own cable, or buying cable splitters, is there another way to connect multiple fans to a single chanell ? THe aquaaero 6 demo has 10+ fans running on a single fan chanell, and i didnt see multiple Y-splitters !
How was it done ?

I've done some researching on how PWM works.
Here is the difference between PWM and non PWM control.

Basically the non PWM fan normally runs at maximum rated voltage, our case 12V (the value is near this 12 V give or take a few hundreths of Volts)
Then each Fan is rated at a certain Amperage. For instance, the Noctua 140mm Industrial Fan is rated at 0.55 A.
At full load it will use 0.55x12=6.6V
So by droping the Voltage, it will receive less energy, thus consuming less and spinning slower. By controlling the voltage given, you gain control of fan speed.

The PWM control of fan works by turning on and off current all together. Its like you have a big fan that u use to cool down in summer, and take it off 20 seconds, than start it for 10 seconds. In the period of 20 seconds when its not receiveing any current, it will still spin from inertia, thus still cooling, but without using power.

Now PWM fan control does this, only the interval is very fast;
Here is what wikipedia says:

The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.



Now the question is:
Is Aquaero 6 XT controlling PWM fans by manipulating PWM signal, or by reducing Voltage ?
You can imagine this way that if it can manipulate PWM signal it would be worth it to use PWM fans, since you can keep the voltage the same, and you wont have the heating issues that you get by manipulating the fan speed throug voltage reduction.


I wonder, is it because of this that aquacomputer states that the aquaaero 6 XT doesnt have the heating issues the aquaero 5 has when manipulating fan speed ?
Could it have been that this statement is then referring to controlling PWM fans ?


If it will control fan through voltage reduction, then the same heating issues form aquaero 5 will still be present in aquaero 6.

If that is so, then by controlling only PWM fans, you wont be needing passive heatsink or waterblock at all. Im still going to get them, just because they exist, and cooler running increases life span of components.


Some one correct my logic, if i have said something wrong !

So basically if i have pwm fans i otta plug them in the aquaero and if i got only 3 pin fans then in the poweradjust.