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| Welcome to the TekGems Forum. We encourage your questions, comments, and suggestions. |
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Posted: Aug 25, 2005 14:57:54 why would a fan need a 3 and 4 pin power plug? Which one would I use and why? |
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Posted: Aug 25, 2005 15:00:18 Hi DEW - the 4-pin power plug is to receive power to spin the fan from the power supply. The 3-pin is power is used to detect rotations per minute (RPM). You can use just the 4-pin if you want but many case modders like the ability to measure RPM for ambient noise testing. |
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