How to fix 15 FPS lag in GTA VI city scenes with 8GB VRAM?

I'm fed up with 8GB VRAM; in dense city scenes, the frame rate hovers around 15 FPS, making me want to smash my keyboard. I tried dropping the resolution to 1080P, but on my 4K monitor it looked like a mosaic, which was absolute torture. I used the GamePP Resource Scheduler to raise virtual VRAM priority and moved static textures to system RAM. RTSS showed FPS improved to 45-55, and HWInfo64 recorded VRAM temps between 75-81℃. Now I can backup