Hello guys,
 
I'm using a EVGA X99 Micro(1) mainboard. I got a question not specific to this mainboard so I skip the rest of my config ;)
 
I'm planing to install a AIO watercooling solution from Alphacool (Eisbaer and Eiswolf). Both pumps have 3-pin fan connectors for power. Both are capable of running at 7 volts for less noise and vibrations. I'd like to plug both pumps to the X99 Micro mainboard. There are two 3-pin fan connectors at the bottom of the mainboard which can regulate the voltage within the UEFI. I can choose betwenn 0 and 100 percent in 5% steps. Is this scale linear? Does 50% equals 6 volts, 0% equals 0 volts (and of course 100% equals 12 volts)? So 60% are aproximately 7 volts? Correct?
 
Regards
Torben from Germany

Sleipnir23
Hello guys,
 
I'm using a EVGA X99 Micro(1) mainboard. I got a question not specific to this mainboard so I skip the rest of my config ;)
 
I'm planing to install a AIO watercooling solution from Alphacool (Eisbaer and Eiswolf). Both pumps have 3-pin fan connectors for power. Both are capable of running at 7 volts for less noise and vibrations. I'd like to plug both pumps to the X99 Micro mainboard. There are two 3-pin fan connectors at the bottom of the mainboard which can regulate the voltage within the UEFI. I can choose betwenn 0 and 100 percent in 5% steps. Is this scale linear? Does 50% equals 6 volts, 0% equals 0 volts (and of course 100% equals 12 volts)? So 60% are aproximately 7 volts? Correct?
 
Regards
Torben from Germany

Hello,
 
the fan headers on the board can provide voltage up to 12v frequency. The real question you should be asking is the amps each header can provide.
 
With that being said the amps provided by a single header is 1A. That should be sufficient to run your pumps (do not use a fan splitter, run each pump on their own header)

HeavyHemi

EVGATech_MDecker

Sleipnir23
Hello guys,
 
I'm using a EVGA X99 Micro(1) mainboard. I got a question not specific to this mainboard so I skip the rest of my config ;)
 
I'm planing to install a AIO watercooling solution from Alphacool (Eisbaer and Eiswolf). Both pumps have 3-pin fan connectors for power. Both are capable of running at 7 volts for less noise and vibrations. I'd like to plug both pumps to the X99 Micro mainboard. There are two 3-pin fan connectors at the bottom of the mainboard which can regulate the voltage within the UEFI. I can choose betwenn 0 and 100 percent in 5% steps. Is this scale linear? Does 50% equals 6 volts, 0% equals 0 volts (and of course 100% equals 12 volts)? So 60% are aproximately 7 volts? Correct?
 
Regards
Torben from Germany

 
 
Hello,
 
the fan headers on the board can provide voltage up to 12v frequency. The real question you should be asking is the amps each header can provide.
 
With that being said the amps provided by a single header is 1A. That should be sufficient to run your pumps (do not use a fan splitter, run each pump on their own header)

He's fine with the amount of current the pump is going to draw, about 4 watts. He's asking how accurate is the voltage scaling from zero to 12v. For example is 50%, 6v  and if it is, 6v +- what percentage.

This comes down to a basic RMS calculation: https://en.wikipedia.org/wiki/Root_mean_square 
 
Luckily for a square wave (which you can assume that a FET PWM pulse would approximately be) you can simply divide the supplied voltage by the duty cycle as described in the wiki article. 
 
So long answer short, yes this is about 6V. As far as tolerances (+/- what %) we don't really have an answer for you but if you really need this I can check with the PM team 
 
Edit: technically this would be multiplication since 12V * .50 = 6V