DailyTech writes the upcoming Vertex series solid state disks from OCZ will use an Indilinx Barefoot SSD controller. The site heard the controller performs better than expected, OCZ originally specified the drive at 200MB/s sequential read and 160MB/s sequential write, but in OCZ's tests the drive performed up to 250MB/s sequential read and 240MB/s sequential write speeds.
While the firmware is responsible for a large part of the improved performance over the introductory specifications, it is only because of the hardware that it is able to work with. The 120GB and 250GB drives have 64MB of DRAM cache and more channels to access its MLC NAND flash, whereas the 30GB and 60GB drives only have 32MB of cache.
It should be noted that OCZ rounds down its capacities for several reasons. Most storage vendors show capacity in decimal format, whereas Windows show capacity in binary format. This means that the reported capacity is lower than what is on the label.