In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce RTX 3090 KFA2 EX Gamer White 24GB are massively better than the AMD Radeon RX 5500 XT 8GB.

The RX 5500 XT has a 307 MHz higher core clock speed than the RTX 3090, but the RTX 3090 has 192 more Texture Mapping Units than the RX 5500 XT. As a result, the RTX 3090 exhibits a 231.4 GTexel/s better Texture Fill Rate than the RX 5500 XT. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The RX 5500 XT has a 307 MHz higher core clock speed than the RTX 3090, but the RTX 3090 has 64 more Render Output Units than the RX 5500 XT. As a result, the RTX 3090 exhibits a 80.5 GPixel/s better Pixel Fill Rate than the RX 5500 XT. 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 5500 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 16384 MB more video memory than the RX 5500 XT, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the RX 5500 XT has superior memory performance.

The RX 5500 XT has 256.1 GB/sec greater memory bandwidth than the RTX 3090, which means that the memory performance of the RX 5500 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 5500 XT 8GB has 1408. However, the actual shader performance of the RTX 3090 is 18263 and the actual shader performance of the RX 5500 XT is 1689. The RTX 3090 having 16574 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 5500 XT.

The RX 5500 XT transistor size technology is 1 nm (nanometers) smaller than the RTX 3090. This means that the RX 5500 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 5500 XT 8GB requires 130 Watts. We would recommend a PSU with at least 750 Watts for the RTX 3090 and a PSU with at least 450 Watts for the RX 5500 XT. The RTX 3090 requires 220 Watts more than the RX 5500 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 5500 XT.