80mm case fans

hi i just bought 2 80m led case fans...i have an optiplex 755 mini tower desktop..where do i plug in the fans?
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More about 80mm case fans
  1. in the mobo with a 3 pin plug and into the power supply with a 4pin molex

    if they came with a 3 pin only, that is for a mobo, if it is 4 pin that goes into a 4 pin like the the dvd has

    most fans come with a 3 to 4 pin adapter if they are 3 pin

    you can get y lines and spliters too - if you do not have a free 4 you may need a y spliter same with 3 pin

    have fun!
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