AF or SP for frontal fan?

dulix11

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Sep 5, 2013
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I have a CoolerMaster HAF 912 case, and I'm going to be changing the fans in it pretty soon.

I'll be getting 2 AF120 120mm fans, one in the back and one on the top.

Should the frontal fan that goes in front of the HDDs be a SP or AF fan?

Thanks in advance