Not for nothing mlange but, those fans are not proper spec for the DA-7.

The DA-7 fan is a 5 volt fan. Those are all 12 volts.

A 12 volt fan will not operate properly (if at all) on just 5 volts. I'm not sure but, a 12 volt fan may also may damage the DA-7 by pulling too hard on the cooling fan power and/or speed control circuit(s).
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