Well, not trying to spoil this for u guys waiting for TRIM, but I just read this :

Originally Posted by Raja@ASUS

2) There is no trim support for RAID arrays at all at the moment. This will not change until next year i am told - on Windows 8.

Quote Originally Posted by Raja@ASUS View Post
Yes, no RAID support for TRIM at present. And from what my source told me won't be here til next year at the earliest.
All quoted from the ASUS Z77 Official Support Thread...