ASUS Z87 Motherboards - Overview, Guides and Official Support

[TysonM]

Hello!

I have an ASUS Z87-A.

I ran fan tuning on AI Suite and found that it was able to adjust the speed of my 3 case fans... but it wasn't able to adjust my CPU fans (both on CPU and CPU_OPT). Is there something about certain fans that prevent them from being adjusted? I looked them up on Newegg where I bought them yet there were no details listing "controllable" vs "noncontrollable" or something similar.

In AI Suite the options for adjusting the speed for my CPU fans is greyed out, and there is a ! background.

I thought that controlling fan speed would simply be that the motherboard reduces the voltage to the fan, making it run slower... no controller chip or anything needed. What am I missing here?

Edit/Added:

Thanks Raja! I had to re-do fan tuning again after changing that in the BIOS and it works perfectly! Now my CPU fans should last a lot longer, running at high speed only when necessary.