Is it safe to use two PWM fan splitter cables?

[cminusincplusplus]

Mobo: ASUS P9X79:
It has 2 fan connectors that support PWM: CPU_FAN & CPU_OPT.
CPU_FAN connector supports the CPU fan of maximum 1A (12W) fan power.
CHA_FAN1-4 have +5V instead of PWM.

My plan is to use two PWM Y-splitters on the CPU_FAN & CPU_OPT, obviously. Using the CPU_FAN split for a Noctua NH-U12S + NF-F12 iPPC-2000 PWM Fan (push/pull);
and the CPU_OPT split for my rear chassis NF-F12 iPPC-2000 PWM Fan & front intake NF-A14 industrialPPC-2000 IP67 PWM

Noctua NH-U12S
Input Power 0,6 W
Voltage Range 12 V

NF-F12 iPPC-2000 PWM Fan
Max. Input Power 2,16 W
Max. Input Current 0,18 A
Voltage 12 V

NF-A14 industrialPPC-2000 IP67 PWM
Max. Input Power 2,16 W
Max. Input Current 0,18 A
Voltage 12 V

EVGA SuperNOVA 750 P2 Power Supply

Will this work stable and safely?
Will I be able to control the speed of the 4 fans individually? (because 2x two fans use the same PWM-wire)
____________________________________________________________
NF-F12 iPPC-2000 PWM Fan: http://www.noctua.at/main.php?show=productview&products_id=78&lng=en&set=1

NF-A14 industrialPPC-2000 IP67 PWM: http://www.noctua.at/main.php?show=productview&products_id=83&lng=en

Splitters: http://www.newegg.com/Product/Product.aspx?Item=N82E16812162026&cm_re=PWM_Splitter-_-12-162-026-_-Product

PSU: https://www.evga.com/Products/Product.aspx?pn=220-P2-0750-X1

 

[nukemaster]

It honestly takes allot of fan(at least when not using very high powered ones) to get to 1 amp. Most are rated higher than they actually draw.

PWM is much different than voltage control, making overload also less likely.

I think you should be ok(I am also going to guess the CPU and CPU_OPT share the same signal like on many Asus boards)

If you ARE worried, look for a PWM splitter that uses the power supply for 12 volts(The down side is you can only monitor one fan unless you modify it a bit.).

Now moving onto individual control. If it is anything like other Asus boards ALL fans will turn at the same percentage. This does not mean the same speed, but fans that are the same will spin at about the same speed.

The voltage controlled outlets should still be able to control the PWM fans because they are backwards compatible.

 

[cminusincplusplus]

Thank you.
One question though:

This does not mean the same speed, but fans that are the same will spin at about the same speed.

If I interpreted correctly; the fans using the same splitter will receive the same voltage thus rotating at the same speed if the fans are identical. All other fans on separate fan headers can individually be controlled by adjusting voltage, regardless if PWM or not.

 

[nukemaster]

Fans on the same splitter will get the same PWM signal so spin at about the same speed for identical fans. Only 1 will report speed per header.

The CHA_FAN1/2/3/4 may control at the same time(separate from the cpu).

Asus does not specify the exact control setup in the manual, but they do mention it supports the Fan Xpert+ feature so they control for sure.