Gigabyte GA-Z77X-UP5 TH Z77 motherboard review: dual Thunderbolt
 

The GA-Z77X-UP5 TH has another selling point, and that's the inclusion of two Intel Thunderbolt connectors. Since one of the key features of Thunderbolt is the ability to daisy chain multiple devices, a second connector seems superfluous at first. However, Intel also has a cheaper Thunderbolt chip for peripheral devices that do not have the daisy chaining feature. It's likely that more and more Thunderbolt devices will hit the market that cannot be daisy chained, so the presence of a second Thunderbolt adapter is a good way of future-proofing your PC.

http://uk.hardware.info/reviews/3014...al-thunderbolt