How could Nintendo implement a Switch Pro?

[Pyro as Bill]

Pemalite said:

That is the Akitio Thunder2.
It is not using a derivative of USB, it is using dual Thunderbolt 2 ports which piggy back off PCI-Express.

https://www.anandtech.com/show/7049/intel-thunderbolt-2-everything-you-need-to-know
https://www.amazon.com/Akitio-Thunder2-PCIe-Box-intended/dp/B00LTAUTHE

The device itself was actually never designed for graphics cards anyway... And there is a performance penalty and is pretty low-latency.

But it is certainly higher bandwidth and lower latency than the Switch's USB port.

The Akitio Thunder 2 is made for Thunderbolt 2 but in the top two cases they're only using a Thunderbolt 1 connection. The PE4 being used with the HD7970 is using the expresscard slot. The lack of lanes means 4gbps is their max. Some people only had 2gbps to work with and still saw huge improvements.

I get it. Even though USB 3.1/C and a Thunderbolt 1 connection are both 10gbps, USB doesn't have a direct connection to PCI-E like TB/EC/miniPCIe/m.2 so latency hinders it. Ping is more important than speed.

Well... The extra GPU would mostly be used to drive improved visuals, so the CPU shouldn't be anymore limiting than it is currently.
nVidia in theory could leverage it's "Optimus" technology and allow any GPU to work, it isn't hard to beat the Switch's GPU capabilities, even the Geforce 1030 is faster.

Theoretically, all Nintendo would have to do is put the connection in and a 3rd party could do the rest (or most of it)?

A 1030 is 50 flops faster than a 980 but 50 flops slower than a 1080, correct?