OCZ Agility 4 256GB SSD Review @ Neoseeker
 

The Agility 4 was designed to sit on the upper tier of the attractive
mid-range SSD market, and features Indilinx's Everest 2 controller
which should help in preventing performance drop-offs seen in previous
drives which also used asynchronous NAND flash. See how the Agility 4
holds up in terms of performance in our latest OCZ SSD review.

http://www.neoseeker.com/Articles/Ha...gility4_256gb/