Originally Posted by doyll
FanXpert 1 is doing the "commanding" or "directing" of the motherboard to increase or decrease voltage.
Don't have FanXpert 1
So how does the M6F w/ FanXpert2 signal the fan to go at a specific rpm ? It's a loop..... it happens cause the MoBo did its little exercise, plotted and stored all the fan rpm points and knows what rpm goes with what voltage. BTW, when I say MoBo, I'm including the MoBo's BIOS and MoBo utilities under that umbrella. FanXpert2 is a utility for / feature of the the Asus MoBo's BIOS....and the BIOS is stored on a chip on the MoBo.
... you can control the fans directly thru the BIOS or you can more conveniently interface these controls, and in more detail, thru the utility.
"Variable voltage" is only voltage, and is not "serving to command or direct" the fan. Increase voltage and fan speed up, decrease voltage and fan slows down.
Keyboard / mouse send "signals" to motherboard / FanXpert2. FanXpert2 commands motherboard to send X% of 12Volt power gtom fan header and to fan. Fan returns RPM signal to motherboard / FanXpert2 and you see an RPM reading on monitor.
Fan has no ability to to respond to commands of any sort. Motor receives power (voltage) and runs at whatever speed that voltage spins it at. (If fan is PWM than PWM signal commands 12v power pulses to motor).
The PWM signal just turns the 12v on and off.... so shud it be argued that, the PWM isn't controlling the fan speed, it's the length of time that the 12v is on or off that determines fan speed ?
The "command" ***is** the voltage. How does the MoBo a) make, b) command, c) signal the fan go faster ... it sends it more voltage .
Which is why I said semantics.......I gave you two definitions and you are picking the one you want and discarding the other.....you're speaking like a circuit designer (electronics definition) , I'm speaking like a computer user (layman's definition).
A boxing coach tells his boxer to throw left hook when his opponent drops his right. The opponent drops the right and the coach screams "now, now".
I'm saying he threw the left hook cause his coach told him when to do it
Your saying he threw it cause an electrical impulse from his brain made his arm move.
It seems now your argument that it's not the Motherboard that creates the signal but the Motherboard BIOS or Motherboard software ?????? When I say my EK Supremacy cools my CPU, I'd not expect an argument that the water block does not cool the CPU ..... I presume that the reader understands that the water block will have water or coolant running thru it and that there is no need to state it separately ..... and when I say "MoBo", I presume the reader understands that a MoBo has a BIOS and since the BIOS is on a chip that is on the MoBo, it is therefore by definition part of the MoBo. And if I use a BIOS utility to augment or interact with the functions in the BIOS, that still would fall under the umbrella of MoBo.....especially THIS MoBo.
Changing subject; Does FanXpert2 actually using fan speed / RPM setting to control fan speed or is it using fan power percentage setting and RPM is just a reading of the power percentage? Most of the software I've check out is power percentage controlled and the RPM is a reading of what the fan is running at that power percentage setting. IE if I plug in a resistor/diode like many fans and/or coolers come with the same power percentage setting give a lower RPM reading.
Remember on THIS
and other RoG / TUF MoBos, it does that whole fan test thing....it plots a fan curve .... it sends a voltage signal, looks for the tach response (that loop thing I keep referring to) and then plots a curve for % of full speed versus rpm. So when you tell it to do a specific rpm, the MoBo knows what voltage to send for a specific rpm. So when you want a specific rpm, it signals the fan to run at that rpm by sending the appropriate voltage. It even signals the fans to stop running at a certain point so ya don't have them turning on and off when tems waver a little ..... For example.... it determined that the minimum speed of the fan is 307 rpm (25%) but it actually stops the fan at any time when you tell it to go below 404 rpm.
After you click the "Fan Auto Tuning" button it will run a fan tests that lasts between two and five minutes. While running, this tests measures the maximum and lowest RPM of all of the fans inside your case that are connected to one of the fan headers (3-pin or 4-pin) on your ASUS motherboard. Once complete, Fan Xpert 2 now has an intimate knowledge of all of your cooling fans and it knows how to dynamically control them based on the CPU temperature as well as let you manually control them to a rather extreme level.