GeForce RTX 3080 Ti vs Radeon RX 7900 XTX

Intro

Compare those specs to the Radeon RX 7900 XTX, which comes with clock speeds of 1855 MHz on the GPU, and 2500 MHz on the 24576 MB of GDDR6 memory. It features 6144 SPUs along with 384 Texture Address Units and 192 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3080 Ti		350 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 5 Watts (1%)

Memory Bandwidth

In theory, the Radeon RX 7900 XTX should perform a little bit faster than the GeForce RTX 3080 Ti overall. (explain)

Radeon RX 7900 XTX		983040 MB/sec
GeForce RTX 3080 Ti		934297 MB/sec
	Difference: 48743 (5%)

Texel Rate

The Radeon RX 7900 XTX will be much (approximately 63%) faster with regards to AF than the GeForce RTX 3080 Ti. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
GeForce RTX 3080 Ti		436800 Mtexels/sec
	Difference: 275520 (63%)

Pixel Rate

The Radeon RX 7900 XTX will be quite a bit (about 133%) faster with regards to full screen anti-aliasing than the GeForce RTX 3080 Ti, and capable of handling higher screen resolutions better. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
GeForce RTX 3080 Ti		152880 Mpixels/sec
	Difference: 203280 (133%)

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 information (in units of MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics 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 amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.