I found a solution for LINUX but not for windows, it consist in creating a file named “dxvk.conf” that contains 2 lines:
dxgi.maxDeviceMemory=8192
dxgi.maxSharedMemory=8192
The objective is to prevent the vram from being used entirely, in my case I have 10gb, so I sat the limit to 8 (8192mb), set your value accordingly.
Assuming you are running it in lutris: file must placed in the battlenet folder and in the diablo 4 folder, it tricks the game into thinking that’s the maximum vram available, else the game keeps asking for more, with this I never saw the vram going over 8.2 gb, all settings maxed in 2k at 90 fps, ray tracing off, and dlss max quality. Hope it works for you as well.