I now have purchased 4 SSDs for 2 computers. I have installed a new Vista on one computer and Win 7 on the other. The problem I have now is that I can not install AHCI on either computer. I tried in the bios before installs but would not work and without AHCI the trim feature will not work. One computer is using a Asus A8R32-MVP D and the other computer is an Asus P6T . So how do I go about activation AHCI on these computers. I realy need help on this problem. Why has no one else had this problem?