Have to leave for a Funeral, but quickly.
Here is an anadtech review, Jul 10
Compares C300, used on SATA3 and SATA 2, also includes the vertex-2 (Almost idenitical to Pheonix Pro).http://www.anandtech.com/show/3812/the-ssd-diaries-crucials-realssd-c300
I posted a response to your question about Marvel Chipset (Asus U3S6) and trim.
Refer, Question on Asus U3S6 and marvel chipset and trim. Quote from below link
"I'd suggest reading this article (http://www.anandtech.com/show/2973/6...ntel-x58-p55/1)
as it shows where the sata 3 has advantages and may keep you from junking the Asus card, the the marvel sata 3 controler should be used in ACHI mode with MS's driver to get trim support & the best performance, do not use the Marvel driver with the Asus card as you lose Trim support. See the Crucial SSD Forums here ... http://forum.crucial.com/