ASUS ThunderboltEX 3, PCI, Thunderbolt 3, Thunderbolt, PCIe 3.0, 40 Gbit/s, 3.94" (100 mm), 3.35" (85 mm) ASUS ThunderboltEX 3. Host interface: PCI, Output interface: Thunderbolt 3, Thunderbolt, Expansion card standard: PCIe 3.0. Data transfer rate (max): 40 Gbit/s. Width: 3.94" (100 mm), Depth: 3.35" (85 mm)