Although GTA V can run on 1GB cards such as the AMD HD 4870, more powerful 2GB graphics hardware like the Nvidia GTX 660 is recommended for more stable performance. But how powerful a computer you really need depends on your specific requirements. Before you upgrade your graphics card, check your computer specs for compatibility and try overclocking your GPU. And you can use a PC cleaner tool to make sure you’re getting the most out of your existing hardware.