GeForce RTX 3080 Ti vs Radeon RX 7900 XT

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XT		300 Watts
GeForce RTX 3080 Ti		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

In theory, the GeForce RTX 3080 Ti should be 14% quicker than the Radeon RX 7900 XT overall, due to its higher data rate. (explain)

GeForce RTX 3080 Ti		934297 MB/sec
Radeon RX 7900 XT		819200 MB/sec
	Difference: 115097 (14%)

Texel Rate

The Radeon RX 7900 XT should be a bit (more or less 15%) faster with regards to texture filtering than the GeForce RTX 3080 Ti. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
GeForce RTX 3080 Ti		436800 Mtexels/sec
	Difference: 67200 (15%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 7900 XT is a better choice, by far. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
GeForce RTX 3080 Ti		152880 Mpixels/sec
	Difference: 135120 (88%)

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 max amount of information (measured in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the 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 maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.