ThunderboltEX II/Dual PCIeX4 Thunderbolt 2 Controller
Thunderbolt 2 20Gb/s Controller - 2x Thunderbolt 2 External Ports - PCI-Express 2.0 X4 Slot - Full-Height - Intel DSL5520 Controller - Retail Box - Windows Compatible - Compatible with ASUS Z87-Deluxe / Z97-Deluxe / Z97-Deluxe (NFC & WLC) Motherboards - 3 Year Depot Carry-In Mfg. Warranty