[Cristian Nicolescu]

“ExpressCard can only offer 5Gb/s in ver 2.0, which is similar to PCIe2.0 x1 speed.
Thunderbolt has 10Gb/s per channel, and since it’s a dual channel connection, we are talking about 20Gb/s per cable, which is similar to PCIe2.0 x4 speed.

there was a test performed to see how does PCIe link speed affects cards performance :
https://forum.notebookreview.com/gami…ml#post5324240

the test showed up to 20% decrease of frame rate just because of a slower link speed.
and keep in mind that test was performed on a 4870, today’s cards probably uses alot more bandwidth.”

https://hardforum.com/showthread.php?t=1588465