Everything is limited to a PCIe 1.0 x1 connection. External USB 3.0 and ethernet are possible but unlikely because they are already on the mobo.ДЇrom a practical standpoint, external PCIe may cheaper, but it's pointless from a performance standpoint. Read Thunderbolt can externalize anything. and when multiple chip makers can make it then Intel will be the only one worth buying (much like their network interfaces) because nobody can do quality like intel, but at least the price will come down. Until there are multiple chip makers who can make it, then it will continue to be too expensive. Thunderbolt (as much as I love the idea) is made and operated by Intel, and Intel wants to charge a premium for it. Finally it will be an open standard that multiple manufacturers can adopt. And because it is already standardized and cheap technology it will be easier and cheaper to implement. Chip makers will not have to add a new and expensive tech to the device, the connection will just siphon off lanes that are already there. but we have not seen that happen over the copper version that was released.The external PCIe will be cheaper and easier because it will be hosted directly by the mobo chipset, or the CPU by tapping into already existing hardware. It can send PCIe, it can send DP, it was supposed to be able to send USB 1/2/3, as well as Ethernet, all over the same wire.

and when multiple chip makers can make it then Intel will be the only one worth buying (much like their network interfaces) because nobody can do quality like intel, but at least the price will come down.Д¬aedenVthunderbolt is a medium that allows for multiple interconnect protocols to be transmitted over the same wire.

The external PCIe will be cheaper and easier because it will be hosted directly by the mobo chipset, or the CPU by tapping into already existing hardware. but we have not seen that happen over the copper version that was released.

You think the specification will somehow make things cheaper? Nope.thunderbolt is a medium that allows for multiple interconnect protocols to be transmitted over the same wire.

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