Back when OCZ released the RevoDrive 3 X2 in 2011, it was the fastest SSD for desktop users that we had seen. Using PCI Express, it eliminated the SATA bottleneck that most SSDs still face today while also offering hassle-free RAID, though it wasn't without shortcomings.
The RevoDrive 3 X2 was essentially four Vertex 3 SSDs forged together on a single PCB yet it was less than two times faster than a single Vertex 3 in our real-world tests. The same money could buy similar performance with a custom RAID0 setup using separate drives.
Now three years later, OCZ is replacing its RevoDrive 3 X2 with the RevoDrive 350, touted as being the ultimate storage solution for intensive workstation applications. The new RevoDrive has been upgraded to x8 PCIe 2.0 (from x4) and boasts read/write speeds of 1.8/1.7GBps.