CAaronD :
If I am using an Asrock H97 Pro4, does it automatically adjust my fan speed? Seems to have been very loud earlier on, now the noise has been reduced nearly half. I can only hear a faint sort of turbine generator sound, and the sound of the air. What programs would you suggest for me to control my PWR fan's speed?
1) It's PWM not PWR. It stands for "Pulse Width Modulation".
2) Your board is modern so the CASE FAN headers are likely 4-pin. That means it can vary PWM fans that are also variable (i.e. 500RPM to 1800RPM) and MAY also support variable 3-pin (voltage) fans.
*So your fans are VOLTAGE controlled but not necessarily variable.
3) Don't use "SPEED FAN" use the fan control software from the motherboard site which may be part of a program.
4) REPLACING FANS?
If you decide to buy a replacement fan be sure it has the following specs:
a) PWM
b) variable
c) lowest speed isn't greater than 600RPM, and
d) highest speed isn't greater than 2000RPM.
e) 12cm (probably)
INSTRUCTIONS:
a) Plug in fan to motherboard
b) use fan control software to see if you can control it
c) adjust profile as desired (My Bitfenix PWM fans are silent)
OTHER:
a) There are fan control units you can buy but I don't recommend one since it would make more sense to buy a PWM fan or two instead and have the motherboard control it.
b) Many fans that are 1000RPM or below are quite sufficient and very quiet even if you can't control them.