200pcs/lot 12cm Mini 4-pin Gpu Fan Male To Female 4-pin Motherboard Standard Fan Pwm Sleeved Adapter Cable - Pc Hardware Cables & Adapters - AliExpress
Useful PWM cables - ekwb.com
Amazon.com: CRJ Micro 4-Pin PWM GPU Dual Fan Splitter Adapter Cable for Graphics Cards : Industrial & Scientific
Mini 4-Pin GPU to 3 x 4-Pin PWM Fan Adapter MDY-CO433
Use Nvidia GPU Fan As a 4pin PMW Fan(and More) : 4 Steps - Instructables
CPU GPU Fan Laptop Cooling Fan for DC 5V 1.0A 4 pin Radiator for MSI GE66 GP66 G - Walmart.com
4-Pin PWM GPU Fan Cable for Graphics Cards - Easycargo