Create DRIVERS.md

doc/DRIVERS.md

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+## Windows
+
+#### Recomendented drivers:
+* [Adrenalin Edition 18.5.1](https://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Adrenalin-Edition-18.5.1-Release-Notes.aspx)
+* [Adrenalin Edition 18.5.2](https://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Adrenalin-Edition-18.5.2-Release-Notes.aspx)
+* [Adrenalin Edition 18.6.1](https://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Adrenalin-Edition-18.6.1-Release-Notes.aspx)
+
+#### Known issues
+* Blockchain drivers not recomendented to use for `cryptonight/2`.
+* All drivers newer 18.6.1 **not work**, all shares will be rejected.
+
+## Linux
+#### Recomendented drivers:
+* [ROCm 1.9.1+](https://github.com/RadeonOpenCompute/ROCm)
+
+### AMD Vega
+ROCm can't give same perfomance as Windows drivers, last working Linux driver [18.10](https://www.amd.com/en/support/kb/release-notes/rn-rad-pro-lin-18-10) even worse.
+But possible get same or little better hashrate as Windows:
+
+#### Steps:
+* Download and [build](https://github.com/xmrig/xmrig-amd/wiki/Ubuntu-Build) xmrig-amd 2.8.4+ with cmake option `-DSTRICT_CACHE=OFF`.
+* Install [18.10](https://www.amd.com/en/support/kb/release-notes/rn-rad-pro-lin-18-10) driver.
+* Configure and run miner to create OpenCL cache in `.cache` directory near executable.
+* Uninstall 18.10 driver and install [18.30](https://www.amd.com/en/support/kb/release-notes/rn-prorad-lin-18-30) driver, don't forget reboot.
+* Run miner as usuall, if new versions of miner will contains changed OpenCL code, cache regeneration will be required again.