In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 730 v3 Gigabyte 2GB Edition are significantly better than the Nvidia GeForce 7900 GS.

The GT 730 was released over three years more recently than the GeForce 7900 GS, and so the GT 730 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 7900 GS when running the latest games.

The GT 730 has 1792 MB more video memory than the GeForce 7900 GS, 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 GS has 13.4 GB/sec greater memory bandwidth than the GT 730, which means that the memory performance of the GeForce 7900 GS is slightly better than the GT 730.

The GeForce GT 730 v3 Gigabyte 2GB Edition has 96 Shader Processing Units and the GeForce 7900 GS has 20. However, the actual shader performance of the GT 730 is 134 and the actual shader performance of the GeForce 7900 GS is 9. The GT 730 having 125 better shader performance and an altogether better performance when taking into account other relevant data means that the GT 730 delivers a marginally smoother and more efficient experience when processing graphical data than the GeForce 7900 GS.

The GeForce GT 730 v3 Gigabyte 2GB Edition requires 49 Watts to run and the GeForce 7900 GS requires 49 Watts. We would recommend a PSU with at least 300 Watts for the GT 730 and a PSU with at least 350 Watts for the GeForce 7900 GS. The two GPUs require the same amount of wattage to run. As such, there is no need to worry about which will more significantly affect your yearly electricity bills.