can my 3 pin fans hook to my mobo ?

buriedxeno

Commendable
Dec 24, 2016
13
0
1,510
https://m.newegg.com/Product/index?itemnumber=N82E16813128822&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_- , that is my mobo and my case is a rosewill galaxy 03, is it safe to use 2 molex to 3 pin connectors to hook two fans to the psu and have one 3 pin fan in the system fan 4 pin spot on the mobo ?
 
QPWbA4W.jpg
 
Thanks so much ! And leaving that fourth pin exposed wont cause any kind of hazard ? What if a wire touches it or something ? The mobo can easily handle running the fan at 100% speed and will it be a 12v connection through the mobo ? Sorry for all the questions but i much appreciate the assistance ! There would be no fan control with a 3 pin plugged in a 4 pin right ?
 
So the fan will run at 12v 100% speed that way with no control over it right ? It wont cause any extra unusual stress to the mobo that way ? My mobo doesnt have the 3 pin marker on the 4 header like the one in that above image has, thats one reason i was concerned about doing it. Which two fans should run by the psu and which one by the mobo, Or does it matter ? T
he front fan also has an led light 4 pin hookup also if that affects anything from being hooked up.