LOL if I'm not upset now, I won't be.
Yes.. you will lose perf on performance hard drives such as WD Raptors. They are being pounded by NCQ, a unneeded cache and read-ahead feature only network servers can take advantage of
Dont have cow.. its not a massive drop in perf but you know every cycle counts.
So just go with what you have.
Whats really strange is you can not shut down AHCI and switch over to ENHANCED IDE. Usually on reboot you go into Windows and windows then installs the ENHANCED IDE driver for the system automatically.. then you reboot again with a huge list of primary and secondary IDE's showing up.. the same number as the SATA ports on the board
Why its not working that way for you is strange.