Originally Posted by mm67
Actually they don't seem to be the same fans. These are the specs for 140 mm fans that you can buy separately :
Dimensions: 140 x 140 x 25mm
RPM: 800 +/- 10% RPM
And this is listed in Arc Midi specs :
Fan controller for 3 fans included
1 front mounted Fractal Design 140mm fan @ 1000rpm included
1 rear mounted Fractal Design 140mm fan @ 1000rpm included
1 top mounted Fractal Design 140mm fan @ 1000rpm included
Additional 5 fan slots available for optional fans; one 140mmin front, one 120/140mm in bottom, two 120/140mm in top and one 140/180mm in side panel
Top panel can mount either 3x 120mm fans, 3x 140mm fans or 1x 180mm + 1x 120/140mm fans
I didn't like mine, I replaced them with Thermalright X-Silent fans.
How are the X-Silent fans? Better flow, temps, focus? I noticed the stock fans tend to blow out toward the edges of the fan.
I bought ty-140 fans for the rear exhaust , the bottom (near psu), and they seem to have a stronger
more focused flow. Now I am looking for the two stock fans I have in the front.