Sonnet Technologies Tempo PCIe 3.0 SSD (256GB) Adds One Super-Fast 256GB SSD to Your System-Mounts one high-performance Gen 3 M.2 PCIe SSD in your Mac Pro tower's, desktop PC's, or Thunderbolt expansion system's PCIe slot Boot Support-Supports booting under OS X Low-Profile Form Factor-Card fits in any computer with an x4 or larger PCIe slot, regardless the space (full-height and low-profile PCIe brackets included) Optimized for Maximum Performance Over Thunderbolt 2-Perfect for use in Sonnet's EchoTM Express, xMacTM Pro Server and xMac mini Server Thunderbolt 2-to-PCI Express card expansion systems; 1350 MB/s read, 1288 MB/s write AHCI Compliant-No drivers required