According to the release notes, the Radeon Software Crimson ReLive Edition 17.6.2 driver brings both multi-GPU profile for DiRT 4 as well as up to 30 percent performance improvement when using 8xMSAA on Radeon RX 580 8GB graphics card in the same game. It also includes an up to four percent performance improvement on Radeon RX 580 8GB graphics card in Prey game.
The list for fixed issues is rather short and only includes the previously mentioned performance drop when using 8xMSAA in DiRT 4 game, so all graphics cards should benefit and have a slight performance boost on those settings.
As always, the Radeon Software Crimson ReLive 17.6.2 driver supports all Radeon series graphics cards since HD 7700/HD 7900 days and is available for Windows 10 and Windows 7 in both 32-bit and 64-bit versions as well as Windows 8.1 in 64-bit version.
You can check out full release notes and download the latest Radeon Software Crimson ReLive 17.6.2 driver over at AMD's support page.