http://www.samsung.com/semiconductor/minisite/ssd/download/tools.html

3.1:

https://s3.ap-northeast-2.amazonaws.com/global.semi.static/SAMSUNG_SSD_970_Driver_190125/7FD357322A6707A720E1A71EF11A3BE1EED819E011D317626415F0281A68833C/Samsung_NVM_Express_Driver_3.1.exe

2.3:
http://downloadcenter.samsung.com/content/DR/201710/20171026151637517/Samsung_NVM_Express_Driver_2.3.exe

2.2:
http://www.samsung.com/global/business/semiconductor/minisite/SSD/downloads/software/Samsung_NVM_Express_Driver_22.zip

950pro
http://www.samsung.com/global/business/semiconductor/minisite/SSD/downloads/software/Samsung_NVM_Express_Driver_22.zip