Question 1

How many cfm, or cubic feet per minute?

Accepted Answer

Google says "120,2 cubic meters per hour to cubic feet per minute = 70,747049 (cubic feet) per minute." I can type that in with the best of them.

Question 2

Is this an airflow fan or a static pressure fan?

Accepted Answer

The fan blades are shaped for static pressure. https://www.amazon.com/dp/B00KF7PPY4/ref=psdc_11036291_t1_B07CG2PGY6 are shaped for airflow. These are static optimized fans

Question 3

If I want to only use  two wires on this fan for max speed, which leads should I use green / black ?

Accepted Answer

Here's some info that might help you, and should answer that question giving you some confidence...  that extra pin on a 4 pin fan is the digital speed control -- this is why the fan goes at max speed if plugged into a 3 pin connector (letting the 4th pin just hang over the side), rather than a a 4 pin connector.  Pin number 3 is what tells your motherboard the rotations per minute (RPM) of the fan.  So, all that you are left with is the first two pins.  The first pin is ground (almost always black) and the second pin is the power (it's 12 volts, but you can get 5 volts from the a custom connector from the power supply instead of the 4 pin motherboard connector if you want to have a slower fan).  Here's a chart:

For 4-Wire Pulse Width Modulation (PWM) Controlled Fans

Pin 	Name 	Description	Wire color(usual)
1	GND 	Ground            black
2	+12V	Fan Power	yellow
3	SIGNAL	Fan RPM	        green
4	PWM	Digital Control	blue

So to answer your question, yes it is possible to just use the first two pins (regardless of color, although the first one is almost always black, but the color of the second one is not always the same).

Question 4

Will the pwm control on this fan stop it completely even with power to +12v/gnd?

Accepted Answer

On my motherboard (ASUS X99-E WS), can't speak for any other motherboards, any percentage below 50% results in no movement, giving you only really adjustment between 50-100%. I found this somewhat frustrating, but I do prefer this to them never coming to a complete stop.

ASIN	B07CG2PGY6
Amazon 売れ筋ランキング	パソコン・周辺機器 - 80,841位 ( パソコン・周辺機器の売れ筋ランキングを見る ) ケースファン - 613位
GTIN (Global Trade Identification Number)	09010018100365
UPC	841501110368
おすすめ度	4.8 5つ星のうち4.8 (19,420) var
パック数	1
ブランド名	Noctua
メーカー名	Noctua
メーカー型番	NF-P12 redux-1700 PWM
モデル番号	NF-P12 redux 1700 PWM
ユニット数	1.0 個
冷却方法	空気
同梱商品	20.0 cm
品目寸法（L x W x H）	12長さ x 12幅 x 2.5高さ cm
商品のハイライト	高風量と静音性を両立した厚さ25mmファン。PCや電子機器の冷却に適し、付属品を必要最小限に絞ったreduxモデル。1700rpm、4ピンPWM接続
商品の入り数	1
商品の重量	0.13 キログラム
商品種別	4ピンPWMファン。
対応アイテム	デスクトップ
最大回転速度	1700 毎分回転数
消費電力（ワット数）	1.08 W
空気流量	120.2 立方メートル/時
素材	ファイバーグラス強化PBT。
電圧（ボルト）	12 ボルト
電源コネクタタイプ	4ピン
騒音レベル	25.1 デシベル

Noctua NF-P12 redux-1700 PWM、静音120mmファン

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