In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 290X Gigabyte WindForce 3X OC Edition Crossfire are significantly better than the Nvidia GeForce GTX 770 Zotac AMP! Edition.

The GTX 770 has a 110 MHz higher core clock speed than the R9 290X, but the R9 290X has 224 more Texture Mapping Units than the GTX 770. As a result, the R9 290X exhibits a 218.9 GTexel/s better Texture Fill Rate than the GTX 770. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 770 has a 110 MHz higher core clock speed than the R9 290X, but the R9 290X has 96 more Render Output Units than the GTX 770. As a result, the R9 290X exhibits a 96.3 GPixel/s better Pixel Fill Rate than the GTX 770. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The R9 290X was released less than a year after the GTX 770, 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 R9 290X has 6144 MB more video memory than the GTX 770, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the R9 290X also has superior memory performance overall.

The R9 290X has 409.6 GB/sec greater memory bandwidth than the GTX 770, which means that the memory performance of the R9 290X is massively better than the GTX 770.

The Radeon R9 290X Gigabyte WindForce 3X OC Edition Crossfire has 5632 Shader Processing Units and the GeForce GTX 770 Zotac AMP! Edition has 1536. However, the actual shader performance of the R9 290X is 4979 and the actual shader performance of the GTX 770 is 1846. The R9 290X having 3133 better shader performance and an altogether better performance when taking into account other relevant data means that the R9 290X delivers a massively smoother and more efficient experience when processing graphical data than the GTX 770.

We would recommend a PSU with at least 600 Watts for the GTX 770, but we do not have a recommended PSU wattage for the R9 290X.