Which one do you have?
I have:
Samsung 950 PRO NVMe M.2 SSD
Up to 2,500MB/s sequential read and 1,500MB/s write
It's pretty fast!
NVMe Intel SSDPMW40
http://www.intel.com/content/www/us/en/solid-state-drives/solid-state-drives-750-series.html
I think mine is an earlier model to yours.