The XS1715 is what, in the car world, you would call a ‘sleeper’. The matte black enclosure and to-the-point labeling does not do justice to the fire-breathing monster that hides beneath. When you pick up a PCIe SSD card you expect it to be fast. In most cases, the bigger the card, the faster it performs. The XS1715 gives you no such confidence. But once you plug it in and start testing, you will quickly realize that this is one of the fastest SSDs on the market.