Fan speed control assistance

Hey all, I tried searching and reading online to find some assistance with this but still cannot figure it out:

I have all of my fans (3 pin fans) connected to my motherboard, but am unable to adjust speeds. From my reading, I understand 3 pin fans will run at full speed; my question is are there any options to control these fan speeds? I was thinking of getting a PWM splitter but my CPU fan is still only 3 pin (so not PWM?) I am not sure if this would work. Is my only option getting a fan controller?

I tried playing around with bios and speedfan without any success.

You'll need a fan controller if your motherboard doesn't allow voltage control of fans.
A PWM splitter will only work for PWM fans.