does win 8.1 have native nvme driver

[Chrysalis]

and is it as good as the custom samsung/intel drivers which probably only support windows 10?

By as good I mean 95% or more as good, so basically almost as good.

 

[pbcopter]

The Samsung driver from here supports Windows 7, 8.1 and 10.

SSD Tools & Software | Download | Samsung V-NAND SSD