Questions
Q1
My Samsung SM951 NVMe drive's transfer speed is low on H170/Z170 board, is there any help can do?

When use Windows standard driver for Samsung SM951 NVMe drive, transfer speed will not run at it's best performance.
Please download the driver from the link below, and go to Device Manager> Samsung NVMe Controller to update the driver.
https://download.biostar.com.tw/temp/FAE/Samsung_NVMe_Drivers.zip