Generally speaking, you should upgrade your GPU when the games you enjoy playing are no longer able to provide playable framerates in your chosen target resolution. This could be 60fps in 1080p, 1440p, or 4K respectively. Alternatively, you may be upgrading your monitor for a new model with a higher resolution and refresh rate and then after something more powerful. We recommend upgrading every five years to stay current with the console parity of console hardware.