PWM Fan Splitter Cable 1 to 2, Black Sleeved 2 Way PC Fan Extension Cable Compatible with Computer 3 Pin & 4 Pin CPU / Case Fans, 10 Inch, 2 Pack

PWM FAN SPLITTER Y-CABLE connects 2 computer PWM fans to a single motherboard fan header;
1 to 2 fan converter cable connects an additional fan to increase airflow in your computer case
MOBO 4-Pin receptacle connects to the 4-Pin header on the motherboard and splits the signal to 2 PWM fans;
Fans can spin at the same speed using software from a motherboard equipped with PWM control
MASTER/SLAVE FAN PLUGS have a 4 pin fan connector a wire that sends the RPM signal to the motherboard connector for synchronizing the fan speed with the other fan;
3 pin fan connector omits the RPM signal pin for tandem fan speeds with both fans
3-PIN & 4-PIN FAN COMPATIBLE with popular brands of computer case cooling fans

3pin fans are run in full speed, no PWM function
Only the fan on 4-pins connector is used for monitoring.
All connected fans are following the same PWM signa, speed control is the same for all fans when use fan controller software like AI stuite/Xspert FAN and EASY TUNE, etc
PWM capable connectors must necessarily be 4-pin, but not all 4-pin motherboard connectors implement or enable the PWM signal modulation by default. Please carefully consult your motherboard documentation in this respect.

PWM 4pin to 2 ports fanout splitter cable
Supports two fans connect to motherboard CPU_FAN header

PWM TX4 4Pin header connect to motherboard CPU_FAN or SYS_FAN

Just one header include 4 wires for PWM control
The other header just include 3 wires
Please make sure the header with full 4pin tips always connect fan preferentially