I got tired of my G4/733 Quicksilver's noise. I know it's not close to the noise the MDD's used to make, but it's still too irritating. So, I'm concidering changing the case fan and possibly the processor fan to papst fans. I just have no idea what the voltage should be, how much they put air through and so on.. I was thinking about 4412FGL & 612FGL models. PAPST 4412FGL: Size:*120 x 120 x 25mm Airflow:*55.3CFM Noise:*26dB Revolutions.:*1600rpm Power:*1.25W Bearing:*Sintec-slide PAPST 612FL Size:*60 x 60 x 15mm Airflow:*11.2CFM Noise:*16dB Revolutions.:*2650rpm Power:*0.4W Bearing:*Sintec-slide (oh and these are just my translations) Now, if someone has any knowledge upon the matter, please tell me what to do.