I just got 2 Yate Loon fans off my friend for free and wanted to know if they were any good: 120x25mm, 46cfm, 1350+10%RPM, 25dB. They are very, very quiet. I'm a little concerned that they aren't that good for cooling. They will be put in the side and internal slot of an Antec 900. So are they any good for cooling?