[Glenn Nelson]

ASRock H170m Pro4, Core i5-6500 (6th gen), 16 GB RAM. Have Samsung 950 Pro M.2, 512 GB.
I built this system and clean installed Windows 10 Pro (not an upgrade). I soon tested it with Crystal Mark.

This seemed good to me, but I knew almost nothing about expected speeds. After reading this thread, it seems I have a winner.
But I was having slow boot times: 25 seconds from power on to Windows login prompt! After much investigation, I discovered that I should install the Samsung SSD drivers - I was only using Microsoft drivers. With Samsung drivers:

Surprising, isn't it? Actually decreased read performance a bit, but improved write speeds. (But note that this is after using the computer for months).

[Dean Schulze]

My Surface Book SSD is very slowwwww. Extracting Eclipse (336 MB) takes 12 minutes!

My SSD is a NVMe Samsung MZFLV256. Here is my CrystalDiskMark, but it seems much slower than this: