make sure the SSD is not being defraged - win 7 by default will run a defrag job on all drives

go to http://www.ocztechnologyforum.com/forum/forum.php ... there support forums are awsome

i use http://sourceforge.net/projects/ssdtweaker/ this will allow you to toggle many windows settings without hunting them down

AHCI as mentioned is important to get all the speed you can out of the drive, it will require a reload of the OS if that wasn't enabled before install (for me atleast).

Power could be an issue -- too many sata devices on the same power line, or weak power supply. I've had a sata hard drive spin up but the SSD not recognized, and then put the SSD on its own power line from the power supply and all is well with the world.