In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 960 Gigabyte OC 2GB Edition are marginally better than the Nvidia GeForce GTX 960 Inno3D HerculeZ 1X 4GB Edition.

The GTX 960 has a 63 MHz higher core clock speed and the same number of Texture Mapping Units as the GTX 960. This results in the GTX 960 providing 4.1 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 GTX 960 has a 63 MHz higher core clock speed than the GTX 960 and the same number of Render Output Units. This results in the GTX 960 providing 2 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 GTX 960 was released less than a year after the GTX 960, 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 GTX 960 has 2048 MB more video memory than the GTX 960, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 960 also has superior memory performance overall.

The memory bandwidth of the GeForce GTX 960 Gigabyte OC 2GB Edition and the GeForce GTX 960 Inno3D HerculeZ 1X 4GB Edition are the same, which means the GTX 960 and the GTX 960 have equal limitations when it comes to graphical data transfer.

Both the GeForce GTX 960 Gigabyte OC 2GB Edition and the GeForce GTX 960 Inno3D HerculeZ 1X 4GB Edition have 1024 Shader Processing Units. Having the same number of SPUs and using the same architecture means that the performance they offer can be compared by looking at the memory bandwidth, Texture and Pixel Rates. In this case, the GTX 960 has 4.1 GTexel/s better Texture Fill Rate and 2 GPixel/s better Pixel Fill Rate, but the has GB/sec greater memory bandwidth. Although the GPUs are very similar in performance, the GTX 960 takes the edge.

The GeForce GTX 960 Gigabyte OC 2GB Edition requires 120 Watts to run and the GeForce GTX 960 Inno3D HerculeZ 1X 4GB Edition requires 120 Watts. We would recommend a PSU with at least 400 Watts for the GTX 960 and a PSU with at least 400 Watts for the GTX 960. 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.