can't change fan speed

[SithNinjaTyler]

So my computer has 5 fans total: CPU, GPU, PSU, onerear fan, and one side fan (on the side panel.) The side panel one is always so loud though, so I went to change it in the UEFI, and noticed it was at 2500 RPM with my changes doing nothing. (I put the fan on just before I went to the UEF.) I figured I could just save and exit and it would go back, (this was when I suspected something was wrong, since UEFI usually shows effects right on the spot) but nothing changed. I opened it up, checked the fan connector to make sure the pins were lined up to the right spots, and they were. Then I tried another fan header, and it was quieter. Now I was really confused, as the one it's plugged into is set to silent mode... It's a 3 pin connector on a 4 pin, but I don't want to change the pins to avoid shorting... Help me!

Asrock B85M pro-4 Mobo
Intel Core i3 4150 CPU
4GB DDR3 RAM
GTX 750 Ti GPU
Corsair CX500M PSU

 

[revernt]

I suggest trying ASRock's A-Tuning program: http://www.asrock.com/mb/Intel/B85M%20Pro4/?cat=Download

Go into tools and FAN-Tastic Tuning. It's pretty simple and very effective.