OCZ Technology Vertex 4 256GB Solid State Drive Review @ Bigbruin.com
 

The OCZ Technology Vertex 4 256GB solid state drive is an impressive unit, and a nice upgrade over the previous generation of Vertex drives. During testing it was particularly strong in most of the read tests where the only close competition was an Intel 520 series drive. However, when it came to write speeds none of the reference drives were even close.

http://bigbruin.com/content/oczvertex4_1