Fan Static pressure matter on a heatsink

[bmorbyus]

Does fan static pressure effect cooling on a heatsink? Like if a fan had a greater cfm but lower static pressure vs lower cfm but higher static pressure! Thanks for the feedback!

[Skiiwee29]

Higher static pressure is almost always going to be better for normal type fans. The pressure is what forces the air to flow through restrictive surfaces such as heatsinks. Airflow fans just throw air around and doesnt really care where it goes. 

[Nocte]

For heatsinks you definitely want good static pressure so that the air is forced through the fins.

[WoodenMarker]

Fan airflow is lowered when up against obstructions like a heatsink as opposed to open air. Static pressure is necessary to get past obstructions and more static pressure is required to maintain airflow for more restrictive areas.

The optimal fan has as much airflow as possible while having enough static pressure for where it's being used. 

[Bcat00]

You want balance, that's the best option.

Take the NF-F12 that just about everyone recommends around here for some reason. I absolutely hate/detest that model from Noctua. It's way too optimized for static pressure that it pushes little to no air.

 

Can't use it for case inflow because it pushes no air, can't really beat a balance fan like the NF-P12 model because air is air. if you push enough of it then any loss of pressure will be removed with the extra air.