GeForce RTX 3090 vs Radeon RX 7900 XT

Intro

Compare all of that to the Radeon RX 7900 XT, which comes with a 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 is made up of 5376 SPUs, 336 TAUs, and 192 ROPs.

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 in theory be a 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 little bit (about 10%) better at texture 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

The Radeon RX 7900 XT will be much (about 84%) better at full screen anti-aliasing than the GeForce RTX 3090, and also able to handle higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per 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 called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.