that it's not the videocard but also don't think it's the game that's the problem because it's got "Platinum" status and I have been running it for several years first with my Nvidia graphics card and now my AMD graphics card. Do you have the nvidia-utils installed and what other nvidia pack
01:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 980] (rev a1)
ii libnvidia-cfg1-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-470 470.63.01-1pop0~1631198057~21.04~5c55171 all Shared files used by the NVIDIA libraries
ii libnvidia-compute-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA libcompute package
ii libnvidia-compute-470:i386 470.63.01-1pop0~1631198057~21.04~5c55171 i386 NVIDIA libcompute package
ii libnvidia-decode-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-decode-470:i386 470.63.01-1pop0~1631198057~21.04~5c55171 i386 NVIDIA Video Decoding runtime libraries
ii libnvidia-encode-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVENC Video Encoding runtime library
ii libnvidia-encode-470:i386 470.63.01-1pop0~1631198057~21.04~5c55171 i386 NVENC Video Encoding runtime library
ii libnvidia-extra-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 Extra libraries for the NVIDIA driver
ii libnvidia-fbc1-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-fbc1-470:i386 470.63.01-1pop0~1631198057~21.04~5c55171 i386 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-gl-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-gl-470:i386 470.63.01-1pop0~1631198057~21.04~5c55171 i386 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-ifr1-470:amd64 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii libnvidia-ifr1-470:i386 470.63.01-1pop0~1631198057~21.04~5c55171 i386 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii libvkd3d1:amd64 1.1-5 amd64 Direct3D 12 to Vulkan translation - library
ii libvkd3d1:i386 1.1-5 i386 Direct3D 12 to Vulkan translation - library
ii libvulkan1:amd64 1.2.162.0-1 amd64 Vulkan loader library
ii libvulkan1:i386 1.2.162.0-1 i386 Vulkan loader library
ii mesa-vulkan-drivers:amd64 21.2.1-2ubuntu1pop0~1631200248~21.04~4d5cd49 amd64 Mesa Vulkan graphics drivers
ii mesa-vulkan-drivers:i386 21.2.1-2ubuntu1pop0~1631200248~21.04~4d5cd49 i386 Mesa Vulkan graphics drivers
ii nvidia-compute-utils-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA compute utilities
ii nvidia-dkms-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA DKMS package
ii nvidia-driver-460 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 Transitional package for nvidia-driver-470
ii nvidia-driver-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA driver metapackage
ii nvidia-kernel-common-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 Shared files used with the kernel module
ii nvidia-kernel-source-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA kernel source package
ii nvidia-settings 470.57.01-0ubuntu0.21.04.1 amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-utils-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA driver support binaries
ii screen-resolution-extra 0.18build2 all Extension for the nvidia-settings control panel
ii xserver-xorg-video-nvidia-470 470.63.01-1pop0~1631198057~21.04~5c55171 amd64 NVIDIA binary Xorg driver