Metroid Prime 3 FPS drops after GPU Upgrade

[Danky-Di]

Hey Guys,

I recently upgraded my GPU (NVidia 1080 Ti --> AMD 6900 XT) and suddenly I am encountering strange fps drops (30-45 fps) in Metroid Prime 3.

These fps drops only occur in some situations, e.g.:

• Charging the Beam
• Switching to Scan Visor
• Some particle effects of certain enemies
• Some environmental objects
  

Strangely, when switching Dolphin from (borderless) fullscreen to window, charging the beam und using the scan visor will not lead to stuttering (but the other situations/effects still do).

I have tried changing several options including Vulkan/D3D 12, some Enhancements-options and Hacks-options.
Hybrid ubershaders with ahead compiling are always used as well as AA (8x SSAA), Anisotropic Filtering (16x) and No Post-Processing

Metroid Prime 3 is the only Wii game I own. F-Zero GX runs fine, so I assume that Gamecube games are not affected at all.

Here are my specs and Dolphin version:

• CPU: AMD Ryzen 5950X
• GPU: AMD RX 6900 XT
• MB: Asus TUF Gaming X570-Plus
• RAM: Patriot Viper Steel 32 GB
• OS: Windows 10 20H2
• Dolphin Version: 5.0-15132
  

Any help is appreciated.
Thank you!