

I also know about nmbtc.com site. That's why I know all about cables and signals in fan. Yellow cable is PWM, but this is not a PWM from normal computer. He has 200Hz... Standard PWM have 25kHz (from PDF specs). But to find out what are the real shapes of signals I must buy oscilloscope. On ebay costs only 75,80$ DSO201


Fans I intend to mount, are very quiet. This is Nocuta so even at full speed they will run quieter than previous fans at low speed.