Hi!
I have a Asus Z68-v with ASMedia USB 3 driver,too. I use CalDigitUSBxHCI,and CalDigitFastIO kexts, everything is working perfectly with DSDT.
I know that the modified Z77 UEFI Bios does not require DSDT,maybe without this one you can use these attached kexts,or you have to use your own...