Just got the fans!

Tried them right away. What i found was that the GT 1150 was very silent even at 12v (no rad) and the S-flex F rather noisy. And I also tried a Yate SL from petras. At 12v the SL is much more noisier compared to the GT 1150. But the GT have that high pitch hum to it. Not as much on 1150 rpm but with the 1850 martin recorded. But what i found out that was that if I took the fan from the table and held it in my hand it disappeared! And also if I put some rubber or anything that could act as a antivib material it was gone. So I think that the sound comes from mounting without antivib.

Martin did you use some kind of material to act as a anti vibb when you mount the fans? If you aren't using that the fans will get even quieter. Try holding the GT 1850 in your hand and try!

So far i have only gotten good impressions from the GT!