GeForce RTX 3080 12 GB vs Radeon RX 7900 XTX

Intro

Compare that to the Radeon RX 7900 XTX, which makes use of a 5 nm design. AMD has clocked the core speed at 1855 MHz. The GDDR6 memory runs at a speed of 2500 MHz on this card. It features 6144 SPUs along with 384 TAUs and 192 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3080 12 GB		350 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 5 Watts (1%)

Memory Bandwidth

Theoretically, the Radeon RX 7900 XTX should be just a bit faster than the GeForce RTX 3080 12 GB in general. (explain)

Radeon RX 7900 XTX		983040 MB/sec
GeForce RTX 3080 12 GB		934298 MB/sec
	Difference: 48742 (5%)

Texel Rate

The Radeon RX 7900 XTX will be a lot (more or less 102%) faster with regards to AF than the GeForce RTX 3080 12 GB. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
GeForce RTX 3080 12 GB		352800 Mtexels/sec
	Difference: 359520 (102%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 7900 XTX is a better choice, and very much so. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
GeForce RTX 3080 12 GB		141120 Mpixels/sec
	Difference: 215040 (152%)

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 information (measured in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are applied in one second. This number 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could 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 Raster Operations Pipelines by the the core 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.