When it comes to our throughput test the 970 EVO produces a much smoother performance curve when writing. Writes peak at 2646.72MB/s (2MB block size) before ending the test at 2619.12MB/s. Reads peak at 2770.20MB/s (2MB block size) before falling back quite some way to 2234.50MB/s at the end of the test run.
In our throughput tests, the Samsung 970 EVO is the second fastest drive we have tested to date, sitting just below WD's Black NVMe drive.