These are 140 mm.
I have 4 fans, 2 on each side of the vertical blade.
So iam cooling my power and hashing module from both sides with
the powerful scythe ultra kaze 120 mm 3000 rpm and 230 m^3/h.
Each fan needs around 7 watt.
My heatsink is on 28 C, my chips are on 46 C and my powermodule on 26 C.
Overclocked at 1.2 V, running at 13200 mhs.
I took the temps after 30 hours and choosed the hottest spots of each modul.
Dont know, what are the max temps?
I think with this temps the blade will live forever
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
Please dont use the same cables to connect blade and fans or for two blades...cables could get hot and ... melt
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
Really not worth to risk and try. Only a advice.