4 pin fan with 3 pin fan controller need help | TechPowerUp Forums
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Generic SF-7015-3P Computer PC Case Fan w/3-Pin Connector Black 2.75" x 2.75" 683728193669 | eBay
How To Convert A 3 PIN Into A 2Pin Fan - YouTube
DELL fans use a different pin-layout than normal fans, so watch out before connecting them! « The Wiert Corner – irregular stream of stuff