Source: TechPowerUp!

AMD today released its third Radeon Software Crimson Edition update for this month. Version 16.5.2.1 provides a massive 35 percent performance increase for Radeon R9 390 series graphics cards (R9 390, R9 390X) on “Doom” (2016), compared to version 16.5.2, released earlier this month. The change-log does not mention whether this is also applicable to the nearly identical Radeon R9 290 series (R9 290, R9 290X, and R9 295X2). Not much else has changed, which explains the version numbering.

You can download the Radeon Software Crimson Edition version 16.5.2.1 drivers here.