In terms of overall gaming performance, the graphical capabilities of the AMD Radeon RX 480X 4GB are massively better than the AMD Radeon RX 460 2GB.

The RX 480X has a 60 MHz higher core clock speed and 200 more Texture Mapping Units than the RX 460. This results in the RX 480X providing 233.4 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The RX 480X has a 60 MHz higher core clock speed and 112 more Render Output Units than the RX 460. This results in the RX 480X providing 129.8 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The RX 480X was released less than a year after the RX 460, and so they are likely to have similar driver support for optimizing performance when running the latest games.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The RX 480X has 2048 MB more video memory than the RX 460, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The memory bandwidth of the Radeon RX 460 2GB and the Radeon RX 480X 4GB are the same, which means the RX 460 and the RX 480X have equal limitations when it comes to graphical data transfer.

The Radeon RX 460 2GB has 896 Shader Processing Units and the Radeon RX 480X 4GB has 4096. However, the actual shader performance of the RX 460 is 1075 and the actual shader performance of the RX 480X is 5325. The RX 480X having 4250 better shader performance and an altogether better performance when taking into account other relevant data means that the RX 480X delivers a massively smoother and more efficient experience when processing graphical data than the RX 460.

The Radeon RX 460 2GB requires 75 Watts to run and the Radeon RX 480X 4GB requires 175 Watts. We would recommend a PSU with at least 350 Watts for the RX 460 and a PSU with at least 500 Watts for the RX 480X. The RX 480X requires 100 Watts more than the RX 460 to run. The difference is significant enough that the RX 480X may have an adverse affect on your yearly electricity bills in comparison to the RX 460.