This only applies to RAID 0, meant to quote the guy asking above but for some reason i jacked it up somehow, lol

Basically, you have to have a 7 series board or newer, and Intels RST drivers version 11.2 or newer. TRIM will never work on anything older, as far as "on-board" raid controllers go. If you have a "real" raid controller you should be all good, i know that most of the LSI, Adaptec, Highpoint, and even some of the intel cards will send trim thru but they aren't cheap, depends on what your main goal for the system is.