In terms of overall gaming performance, the graphical capabilities of the AMD Radeon RX Vega 64 Dataland 8GB are significantly better than the AMD Radeon R9 280X Crossfire.

The RX Vega has a 397 MHz higher core clock speed and the same number of Texture Mapping Units as the R9 280X. This results in the RX Vega providing 101.6 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 RX Vega has a 397 MHz higher core clock speed than the R9 280X and the same number of Render Output Units. This results in the RX Vega providing 25.4 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 RX Vega was released over three years more recently than the R9 280X, and so the RX Vega is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the R9 280X 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 RX Vega has 2048 MB more video memory than the R9 280X, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the R9 280X has superior memory performance.

The R9 280X has 320 GB/sec greater memory bandwidth than the RX Vega, which means that the memory performance of the R9 280X is massively better than the RX Vega.

Both the Radeon RX Vega 64 Dataland 8GB and the Radeon R9 280X Crossfire have 4096 Shader Processing Units. While the two GPUs have the same number of SPUs, the actual performance delivered by the RX Vega is 4116 and by the R9 280X is 4096. Knowing that the shader performance of the RX Vega is superior, it is not necessary to examine the GPUs' respective Texture and Pixel Fill Rates.

The RX Vega transistor size technology is 14 nm (nanometers) smaller than the R9 280X. This means that the RX Vega is expected to run slightly cooler and achieve higher clock frequencies than the R9 280X.

The Radeon RX Vega 64 Dataland 8GB requires 295 Watts to run and the Radeon R9 280X Crossfire requires 550 Watts. We would recommend a PSU with at least 600 Watts for the RX Vega and a PSU with at least 1000 Watts for the R9 280X. The R9 280X requires 255 Watts more than the RX Vega to run. The difference is significant enough that the R9 280X may have an adverse affect on your yearly electricity bills in comparison to the RX Vega.