The Lightning LTNG-XQ-DT is a desktop TB2 to PCIe adapter featuring four x16 PCIe full-height/full-length expansion slots and dual TB2 bridge controllers requiring two bus connections to its host computer. With power and cooling to spare for almost any compatible PCIe cards, the LTNG-XQ-DT is unique in its dual 20Gb/s bus architecture and of course provides daisy-chain expansion.