hey there, I have a Rosewill Challenger ($50) case and I found that the rear case fan has a 3 pin connector whereas the other two fans that come with the case have molex 4 pin connectors. Is it safe and desirable to connect the 3 pin connector AND an aftermarket cooler to the motherboard, and then just have the other 2 fans connected to the PSU? Or should I get an adapter and have all 3 case fans with molex 4 pin connectors? thanks