I'm also building my first ever hackintosh and wondering this same thing. The above response didn't really answer the question so I'm hoping someone else could clarify on how to identify which type of DSDT one should use.
I don't know if this information is of any importance but I'm using a Gigabyte GA-Z68P-DS3 motherboard, and an i5-2500K. Looking for which Fx I should be using, or how to determine which value of x should be used.
I would like to start the install in about two hours so any input before then would be greatly appreciated. Thanks in advance.