Solid-state drives are so speedy these days that that even a SATA interface might not have the bandwidth to cope. It's a good thing that Samsung has started mass-producing the first PCI Express-based SSDs for Ultrabooks, then. The new XP941 series uses PCIe's wider data path to read at nearly 1.4GB/s -- that's 2.5 times faster than the quickest SATA SSDs, and nimble enough to move 500GB in six minutes. It also ships in a tinier M.2 format that makes pas
