In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 750 EVGA Superclocked 1GB Edition are significantly better than the Nvidia GeForce 9800 GTX SLI.

The GTX 750 has a 540 MHz higher core clock speed than the 9800 GTX, but the 9800 GTX has 80 more Texture Mapping Units than the GTX 750. As a result, the 9800 GTX exhibits a 36.7 GTexel/s better Texture Fill Rate than the GTX 750. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 750 has a 540 MHz higher core clock speed than the 9800 GTX, but the 9800 GTX has 16 more Render Output Units than the GTX 750. As a result, the 9800 GTX exhibits a 2.2 GPixel/s better Pixel Fill Rate than the GTX 750. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 750 was released over three years more recently than the 9800 GTX, and so the GTX 750 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the 9800 GTX when running the latest games.

The GeForce 9800 GTX SLI and the GeForce GTX 750 EVGA Superclocked 1GB Edition have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The 9800 GTX has 60.6 GB/sec greater memory bandwidth than the GTX 750, which means that the memory performance of the 9800 GTX is much better than the GTX 750.

The GeForce 9800 GTX SLI has 128 Shader Processing Units and the GeForce GTX 750 EVGA Superclocked 1GB Edition has 512. However, the actual shader performance of the 9800 GTX is 86 and the actual shader performance of the GTX 750 is 894. The GTX 750 having 808 better shader performance is not particularly notable, as altogether the 9800 GTX performs better when taking into account other relevant data.

The GTX 750 transistor size technology is 37 nm (nanometers) smaller than the 9800 GTX. This means that the GTX 750 is expected to run much cooler and achieve higher clock frequencies than the 9800 GTX.

The GeForce 9800 GTX SLI requires 280 Watts to run and the GeForce GTX 750 EVGA Superclocked 1GB Edition requires 55 Watts. We would recommend a PSU with at least 600 Watts for the 9800 GTX and a PSU with at least 300 Watts for the GTX 750. The 9800 GTX requires 225 Watts more than the GTX 750 to run. The difference is significant enough that the 9800 GTX may have an adverse affect on your yearly electricity bills in comparison to the GTX 750.