Noctua NA-SYC1, 4 Pin Y-Cables for PC Fans (Black) : Electronics
NF-A4x10 FLX
Amazon.com: Combo 2 Pieces of 3 pin to 2 pin Cable Adapter for Mobile Rack D2P or Cooling Fans, ship from Los Angeles : Electronics
power supply - Converting 3-pin brushless fan to 2-pin - Electrical Engineering Stack Exchange
3-Pin to 2-Pin Fan Adapter Cable Noctua NA-AC2 | eBay
Noctua NA-SYC1 BLUE chromax 4-pin Spliter Y-Cables PWM 2 Fans via one Adapter | eBay
Noctua 2-Pin Computer Case Fans for sale | eBay
Amazon.com: 3 to 2 Pin Adapter D Style : Electronics
Noctua 2-Pin Computer Case Fans for sale | eBay
Noctua PWM specifications white paper
TWO Noctua NA-YC1 Y Cable Splitters Black 2 PWM Fans to 1 Header 4-pin adapters | eBay
3D Printer Optimization Guide Make 3D printer quieter
NA-SYC1
Noctua NF-A4x20 FLX 12V Quiet Computer Cooling Fan 40mm
NF-A12x25 PWM
FAQ: My Noctua PWM fan starts to spin when the PC boots but then stops, what is wrong?
HELP PLS - upgraded stock psu fan with Noctua NF-A6x25. Soldered black to black and yellow to red and crimped into 2 pin. As far as I'm aware I've not done anything