In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce RTX 3090 KFA2 EX Gamer White 24GB are significantly better than the AMD Radeon RX 5600 XT 6GB.

The RTX 3090 has a 280 MHz higher core clock speed and 176 more Texture Mapping Units than the RX 5600 XT. This results in the RTX 3090 providing 288.5 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 RTX 3090 has a 280 MHz higher core clock speed and 32 more Render Output Units than the RX 5600 XT. This results in the RTX 3090 providing 63.1 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 RTX 3090 was released less than a year after the RX 5600 XT, 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 RTX 3090 has 18432 MB more video memory than the RX 5600 XT, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the RTX 3090 also has superior memory performance overall.

The RX 5600 XT has 288 GB/sec greater memory bandwidth than the RTX 3090, which means that the memory performance of the RX 5600 XT is massively better than the RTX 3090.

The GeForce RTX 3090 KFA2 EX Gamer White 24GB has 10496 Shader Processing Units and the Radeon RX 5600 XT 6GB has 2304. However, the actual shader performance of the RTX 3090 is 18263 and the actual shader performance of the RX 5600 XT is 2336. The RTX 3090 having 15927 better shader performance and an altogether better performance when taking into account other relevant data means that the RTX 3090 delivers a massively smoother and more efficient experience when processing graphical data than the RX 5600 XT.

The RX 5600 XT transistor size technology is 1 nm (nanometers) smaller than the RTX 3090. This means that the RX 5600 XT is expected to run very slightly cooler and achieve higher clock frequencies than the RTX 3090.

The GeForce RTX 3090 KFA2 EX Gamer White 24GB requires 350 Watts to run and the Radeon RX 5600 XT 6GB requires 150 Watts. We would recommend a PSU with at least 750 Watts for the RTX 3090 and a PSU with at least 550 Watts for the RX 5600 XT. The RTX 3090 requires 200 Watts more than the RX 5600 XT to run. The difference is significant enough that the RTX 3090 may have an adverse affect on your yearly electricity bills in comparison to the RX 5600 XT.