In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R7 240 2GB are significantly better than the Nvidia GeForce 7900 GTX.

The R7 240 was released over three years more recently than the GeForce 7900 GTX, and so the R7 240 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 7900 GTX when running the latest games.

The R7 240 has 1536 MB more video memory than the GeForce 7900 GTX, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The GeForce 7900 GTX has 22.4 GB/sec greater memory bandwidth than the R7 240, which means that the memory performance of the GeForce 7900 GTX is slightly better than the R7 240.

The Radeon R7 240 2GB has 320 Shader Processing Units and the GeForce 7900 GTX has 24. However, the actual shader performance of the R7 240 is 212 and the actual shader performance of the GeForce 7900 GTX is 16. The R7 240 having 196 better shader performance is not particularly notable, as altogether the GeForce 7900 GTX performs better when taking into account other relevant data.

The Radeon R7 240 2GB requires 30 Watts to run and the GeForce 7900 GTX requires 84 Watts. We would recommend a PSU with at least 400 Watts for the R7 240 and a PSU with at least 400 Watts for the GeForce 7900 GTX. The GeForce 7900 GTX requires 54 Watts more than the R7 240 to run. The difference is significant enough that the GeForce 7900 GTX may have an adverse affect on your yearly electricity bills in comparison to the R7 240.