GeForce RTX 3090 vs Radeon RX 7900 XT

Intro

Compare all of that to the Radeon RX 7900 XT, which comes with a core clock speed of 1500 MHz and a GDDR6 memory speed of 2500 MHz. It also features a 320-bit bus, and makes use of a 5 nm design. It features 5376 SPUs, 336 Texture Address Units, and 192 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XT		300 Watts
GeForce RTX 3090		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

Performance-wise, the GeForce RTX 3090 should theoretically be a small bit superior to the Radeon RX 7900 XT overall. (explain)

GeForce RTX 3090		958668 MB/sec
Radeon RX 7900 XT		819200 MB/sec
	Difference: 139468 (17%)

Texel Rate

The Radeon RX 7900 XT should be a small bit (about 10%) more effective at anisotropic filtering than the GeForce RTX 3090. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
GeForce RTX 3090		457560 Mtexels/sec
	Difference: 46440 (10%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 7900 XT is the winner, by a large margin. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
GeForce RTX 3090		156240 Mpixels/sec
	Difference: 131760 (84%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.