Need help with processor fan

[Tethrys]

Hey all, I've posted in here before and always been happy with the replies. My processor fan has been running really loud for at least a year and a half now, but probably since I built it in Dec '10 and just never noticed it. Currently my set up is:

CPU: AMD Phenom II X4 (http://www.newegg.com/Product/Produc...82E16819103808)
CPU fan: COOLER MASTER Hyper 212 (http://www.newegg.com/Product/Produc...82E16835103065)
Motherboard: ASRock M3A770DE (http://www.newegg.com/Product/Produc...2E16813157176R)
RAM: GeIL 4GB DDR3 (http://www.newegg.com/Product/Produc...82E16820144461)
Graphics Card: VisionTek 900329 (http://www.newegg.com/Product/Produc...82E16814129163)
Power Supply: Antec Basiq BP500u
Case: http://www.newegg.com/Product/Produc...82E16811164093 (It's pretty bad, I know)
Case fan: http://www.newegg.com/Product/Produc...82E16835200048
Operating System: Windows 7

I'd like to make my computer pretty quiet if possible. If I need a new processor and CPU fan, then so be it; preferably a mid-upper range one. I believe a new case would also help since the one I have now has pretty poor ventilation.
I'm also looking for a new mouse if you have any suggestions. Thanks in advance for the help!

Also, for cases I'm looking at http://www.newegg.com/Product/Produc...82E16811119197 and http://www.newegg.com/Product/Produc...82E16811119196 , so if you have any feedback on either case as to why it's good, bad, or another case that would be better, that would be appreciated.

[n0cturnal]

You should be able to turn the speed down on the Hyper 212, no need for buying a new one really. Just make sure your CPU doesn't go above 62c.

[Tethrys]

Sorry to be a complete noob, but how do I turn down the speed on it?

[n0cturnal]

Sorry to be a complete noob, but how do I turn down the speed on it?

The Evo is PVM controlled so either in BIOS or with a program that can adjust it like speedfan.

[stellvia]

Otherwise if you really do think the fan is faulty, just buy another one of the correct size. They're like $10.

[Bodaway]

You may check the fan. I have the same cooler and have had to replace the fan once already. It was getting to be very loud and eventually quit spinning.

Replacement fans are super cheap though.