Flash memory maker OCZ has unveiled the Vertex 4 SATA III SSD as its fastest to date. The 2.5-inch drive reaches sequential speeds of up to 535MBps through an Indilinx Everest 2 controller that reportedly helps it outperform predecessors by a factor of four. It's also much more durable, with cycle erase specs that are outside of the measurable range, according to the creator.