20Gbps is only 2.5GB/s, sounds like I can't even saturate x16 PCI-Express lane running at 252.08 Gbps (=31.51 GB/s) so much to "Thunderbolt"! Correct me if I'm

20Gbps is only 2.5GB/s, sounds like I can't even saturate x16 PCI-Express lane running at 252.08 Gbps (=31.51 GB/s) so much to "Thunderbolt"! Correct me if I'm wrong. The only reason that would make me buy a Macbook Pro is that I can attach eGPUs to it (and hopefully eCPUs in the future aswell). Sources: Google, http://en.wikipedia.org/wiki/Usb3.0#Thunderbolt http://en.wikipedia.org/wiki/Usb3.0#Thunderbolt https://www.google.de/#q=20gigabit++to+gigabyte https://www.google.de/#q=20gigabit++to+gigabyte EDIT: Added sources.