NVIDIA today released their 615.78.08 Linux driver build with a useful improvement for gamers using Steam Play (Proton) with Direct3D 12 games via VKD3D-Proton along with a variety of other fixes.
For NVIDIA Linux gamers relying on VKD3D-Proton, the NVIDIA R615 driver update adds support for the VK_NV_low_latency2 revision 3 Vulkan extension. This update improves latency and stutter with VKD3D-Proton, especially when Frame Generation support is enabled.