The AMD blockchain driver was a patch released to fix the Ethash Dag file growth issue that caused Polaris cards to lose hash rate with every new epoch once the Dag file reached over 2GB. Starting with the Crimson Relive compute drivers that were released for Windows 10 v1703, AMD incorporated the fix from the blockchain driver in to the mainstream release drivers when the cards are set to compute mode.

The correct driver to use for Windows 10 v1703 Fall Creator update and newer versions is the latest AMD Adrenaline driver and set the cards to compute mode.

https://support.amd.com/en-us/kb-articles/Pages/DH-024.aspx