The YouTube channel "Maximum Fury" conducted a technical test of the new Cyberpunk add-on called "Phantom Liberty" on an older AMD hardware system, testing it separately on Linux and Windows 11. The Linux system, specifically the Fedora distribution called Nobara, performed significantly better, delivering 31% more frames compared to Windows 11.
The hardware used for testing included an Asrock B550 motherboard with an AMD Ryzen 5 5600 CPU and an AMD Radeon RX 5700 XT GPU from the first RDNA generation, along with 16 GB of DDR4 RAM. The CPU, RAM, and GPU were overclocked, and the system utilized undervolting to save energy costs.
When testing the game at 1080p resolution with high textures, the Linux system achieved an average of 63.72 frames per second (fps), while Windows 11 managed only 48.55 fps. This suggests that the game should run noticeably smoother on the Linux system.
This is probably more common than you'd think, at least in my anecdotal experience. Converting directx commands to vulkan commands, especially for AMD GPUs, can result in better and more consistent performance on Linux.
Do you have any numbers or examples of games? I know that it's generally the case that DX9 games often have greater performance through DXVK, but DX11 and DX12 should usually be a little bit slower. Also, CPU-bound games are often faster on Linux in my experience, but it's rare for games to be CPU-bound (MMOs etc).
Additionally, OpenGL and Vulkan should be faster on Linux (Native or WINE+OpenGL/Vulkan), but I don't have as much experience with them.
Edit: I found this video which has a few standout games where Linux pulls ahead even on DX11/DX12. Hopefully that's a sign of future trends.
There was a tweet before the recent Cyberpunk update that essentially said "expect very high CPU utilization as we now use the whole CPU" which I thought just meant they dropped the ball somewhere.
I haven't done extensive testing on this as I'm just some dude. It's been a long time since I've had windows running on anything, but the three that I remember are: