Every year at Computex Taipei, certain vendors have this annoying practice of slipping in new products throughout the 5-day event, unannounced of course, hence the need for us journos to re-visit the show halls to see what we've left out. ASUS previously showed off the ThunderboltEX expansion card for select Z77/H77 motherboards and potential support on upcoming AMD AM3+ boards, and today they sneaked in a dual Thunderbolt port expansion card featuring the more expansive but full fledged Intel DSL3510 Cactus Ridge 4C host controller.
Like its single port sibling, the ThunderboltEX/Dual plugs into a PCIe x4 slot and has a cable to interface with the TB_HEADER pinout on select ASUS Z77/H77 or upcoming AM3+ motherboards. Two full-sized DisplayPort interconnect cables are provided to encapsulate DP signals from the graphics card output with the Thunderbolt data streams.