NOTE: NO! JK2309 is WRONG ABOUT HOW TO GET SOUND!
Once you're done with his good Clover Yosemite installation guide:
Simply download Multibeast 6.1.0, install withoutDSDT 898 driver and restart your computer. Once you're back in, go to system preferences and select internal speakers!
I WANT TO REITERATE SOMETHING THAT MAY NOT BE CLEAR.
I have a GA-Z77Z-UP5 TH and after a Clover installation had no sound.
My simple solution was downloading Multibeast 6.1.0 and install the "without DSDT" 898 driver. After reboot just go into sound settings and choose the built in sound.