OpenGL vs. Vulkan Linux Gaming Performance Ending Out 2017

First up was Dota 2 at 1080p where the game becomes basically CPU bound with current hardware. Here the NVIDIA Pascal cards were running a few frames faster with Vulkan over OpenGL, but the AMD Vulkan performance was short of the OpenGL level, likely due to RADV not being as mature as RadeonSI. RADV Vulkan on the RX 580 was running at 82% and the RX Vega 64 at 81%.

When pushing Dota 2 to 4K to more fully stress the cards, the NVIDIA Vulkan performance was superior to its OpenGL performance, but not with the Radeon side. Here the RADV performance was 75~77% the performance of OpenGL with RadeonSI.

When running Dawn of War 3 at 1080p with low quality settings to again be CPU bound, the RadeonSI vs. NVIDIA OpenGL performance is very competitive. But between these two graphics APIs, the GTX 1060 and GTX 1080 Ti had nearly the same performance between Vulkan and OpenGL while the RADV Vulkan performance was just over 80% the speed of RadeonSI.

Or with low quality settings at 4K for Dawn of War 3, the NVIDIA OpenGL vs. Vulkan performance is similar while the RADV performance is at around 80% the speed of RadeonSI.