ASRock doubles down on Thunderbolt ports, cables
 

Computex — While touring ASRock's booth at the Computex trade show in Taipei, Taiwan this afternoon, we caught a glimpse of a rather interesting Thunderbolt implementation. All of the Thunderbolt-equipped motherboards selling right now feature a single port. ASRock's Z77 Extreme/TB4 has dual ports, giving it four channels of Thunderbolt connectivity with a whopping 80Gbps of total bandwidth between them.

http://techreport.com/discussions.x/23049