In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 380X XFX Double Dissipation XXX OC 4GB Edition are significantly better than the AMD Radeon HD 7850 XFX Ultra OC Edition.

The R9 380X has a 15 MHz higher core clock speed and 64 more Texture Mapping Units than the HD 7850. This results in the R9 380X providing 64.3 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 R9 380X has a 15 MHz higher core clock speed than the HD 7850 and the same number of Render Output Units. This results in the R9 380X providing 0.5 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 R9 380X was released over three years more recently than the HD 7850, and so the R9 380X is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the HD 7850 when running the latest games.

The R9 380X has 3072 MB more video memory than the HD 7850, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the R9 380X also has superior memory performance overall.

The R9 380X has 28.8 GB/sec greater memory bandwidth than the HD 7850, which means that the memory performance of the R9 380X is slightly better than the HD 7850.

The Radeon R9 380X XFX Double Dissipation XXX OC 4GB Edition has 2048 Shader Processing Units and the Radeon HD 7850 XFX Ultra OC Edition has 1024. However, the actual shader performance of the R9 380X is 1723 and the actual shader performance of the HD 7850 is 849. The R9 380X having 874 better shader performance and an altogether better performance when taking into account other relevant data means that the R9 380X delivers a massively smoother and more efficient experience when processing graphical data than the HD 7850.

The Radeon R9 380X XFX Double Dissipation XXX OC 4GB Edition requires 190 Watts to run but there is no entry for the Radeon HD 7850 XFX Ultra OC Edition. We would recommend a PSU with at least 650 Watts for the R9 380X and a PSU with at least 500 Watts for the HD 7850. The R9 380X has been recommended a PSU with 150 Watts more than the HD 7850. The difference is significant enough that the R9 380X may have an adverse affect on your yearly electricity bills in comparison to the HD 7850.