Akitio Thunder2 PCIe Box - Not intended for the use of Graphic Cards Two Thunderbolt 2 ports for lightning fast speeds of up to 20Gb/s 1 PCIe (x16) slot supporting half-length, full-height, double-width cards 4 lane PCI Express 2.0 compliant interface at 5.0Gbps Removable back panel for double-width cards This Product was not intended for the use of Graphic Cards Two Thunderbolt2 ports for lightning fast speeds of up to 20Gb/s 1 PCIe (x16) slot supporting half-length, full-height, double-width cards 4 lane PCI Express 2.0 compliant interface at 5.0Gbps Removable back panel for double-width cards Daisy-chain up to 6 Thunderboltdevices Durable and rugged aluminum casing No tools required for installation Thunderbolt cable is included