Which wire is negative on this PC fan? - Electrical Engineering Stack Exchange

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I just got this PC fan and it has a 3 pin connector, I know the wire with the white stripe is positive but how can I find out which of the other two wires are negative? If you can't see the photo

GDSTIME 4500RPM 8cm 80mm x 80mm x 25mm 12v Big Airflow High Speed Dual Ball Bearing Brushless DC Cooling Fan 2 Pin : Electronics

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identification - Problem with molex connectors - Electrical Engineering Stack Exchange

Criditpid WHF100 Vent-Free Wall Heater Blower Fan for Mr. Heater, Dyna-Glo, Dyna-Glo 30,000 BTU, Comfort Glow Vent Free Heaters, Replacement Ventless WHF100 Dyna-Glo Heater Fan Accessory Kit: Home & Kitchen

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Antec RGB Case Fans, 120mm RGB Fan, 5V-3PIN Addressable RGB Fans 120mm, Motherboard SYNC with 5V-3PIN, 120mm Fan 5 Packs with Controller, Prizm White Series RGB Fans : Electronics

Should my CPU fan be facing downwards, onto my graphics card (GPU also has its fan facing down)? The logo for my CPU fan is also upside down. I think all of

Energies, Free Full-Text

Energies, Free Full-Text