@3Dpixi

Can you please check shader and if in this shader is not used AO(Ambient Occlusion) and few others, if yes then usually you will get blank render if you are rendering with GPU and OptiX

Are you using OptiX? Can you post your render settings?

Check notifications first, from this you will know what is causing, it can be shader or can be as simple Nvidia driver crash(if this happens then check Overclocking can cause that) or can be just you are running out of VRAM on your GPU

Hope this helps

Thanks, Jura