4-Pin Fan Splitter, CPU Fan PWM Hub Extension Cable PC Adapter 3 pin / 4 pin Ventilator Kabel : Amazon.nl: Elektronica
Adapter 4-pin PWM / 2x 4-pin / 1x 3-pin AK-CA-65
What pin configuration do Noctua fans use? : Noctua Knowledge Centre
Amazon.com: upHere Long Life 120mm PWM 4-Pin High Airflow Quiet Edition Rainbow LED Case Fan for PC Cases, CPU Coolers, and Radiators 3 -Pack,(PF120CF4-3) : Electronics