I wonder if someone know about the technological possibilities with Thunderbolt. The new MacPro will have 6 TB2 ports. - Do we yet know if that is equal to a total bandwidth of 6x20=120 Gbit/s or 3x20= 60 Gbit/s (with switching)? - Is it possible to aggregate several TB channels like it is with ethernet? If it is, would the best use of multiple TB channels be to aggregate them to a "hub" and then balance the load of external devices (high performance storage, 4k displays, PCIe-boxes, 40Gbit Ethernet ) connected to this hub? The reason I wonder is that storage today is increasing performance very fast. Today it is rather cheap to get PCIe connected SSD devices capable of >10 Gbit/s. Yesterday I read that Samsung is introducing XS1715 (NVM Express PCIe SSD, 1.6TB capacity, sequential read speed at 3,000MB/s, 740,000 IOPS). Of course, it is very expensive today, but it is never the less a single device needing a bandwidth of about 3 TB1 channels. Without aggregating TB might be a bottleneck if the bandwidth is not increased significantly in TB versions 3 and 4.