VRAM doesn't matter as much as actual processing power. The only time VRAM will come into play is when you have huge ass textures or if you wanna play onb 1440p or even a mutli-1440p/1600p setup. tl;dr get a more powerful gpu and stop believing that VRAM is an indicator of GPU power. Furthermore that's not even real VRAM, it's your RAM being allocated for gpu use. My 1.5GB 480 will rape the living hell out of your gpu, even if it had 10GB of ram allocated.