THanks. That makes sense they would run slower on less voltage then 12v. So with that kind of amps it will not be noticable. I did order a couple of 5v from this link the otherday. It's nice to have the added security of a fan. I try to do it all by gearing. Had an extra novak fan and put it on my mamba esc and it was just nice to check the temp and it barely over 100.