This is the AMD blockchain driver with optimized performance for Blockchain Compute Workloads released on 23 Aug. 2017 that can be used on mining rigs with good performance and improved hashrate than old drivers. Note that latest AMD drivers like 18.2.3 also perform and are improved, so a move to the new drivers is recommended.

The driver is provided as a beta level support driver which should be considered “as is” and will not be supported with further updates, upgrades or bug fixes.
This driver is not intended for graphics or gaming workloads.
64 Bit drivers for Windows 10 & Windows 7 updated to include support for Radeon™ Vega Frontier Edition (8/23/2017)

Official Links :

Package Contents: Radeon Software Crimson ReLive Edition Beta for Blockchain Compute Driver Version 17.30.1029 (Windows Driver Store Version 22.19.659.0).