Maximum Micro SD Card speed worth buying

[badelhas]

I know that the HTC 10 is compatible all speed classes: UHS-I U1, UHS-I U3 and UHS-II U3 (the fastest available). But the whats the maximum speed this SOC allows?
Meaning, could someone with these cards do a speed read and write test so we can see if it´s worth buying the fastest available or not?

Cheers