GeForce RTX 3080 12 GB vs Radeon RX 7900 XT

Intro

Compare that to the Radeon RX 7900 XT, which uses a 5 nm design. AMD has clocked the core speed at 1500 MHz. The GDDR6 memory runs at a frequency of 2500 MHz on this model. It features 5376 SPUs as well as 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 12 GB		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB will be 14% faster than the Radeon RX 7900 XT in general, due to its greater data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon RX 7900 XT		819200 MB/sec
	Difference: 115098 (14%)

Texel Rate

The Radeon RX 7900 XT is much (about 43%) more effective at anisotropic filtering than the GeForce RTX 3080 12 GB. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
GeForce RTX 3080 12 GB		352800 Mtexels/sec
	Difference: 151200 (43%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 7900 XT is superior to the GeForce RTX 3080 12 GB, by far. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
GeForce RTX 3080 12 GB		141120 Mpixels/sec
	Difference: 146880 (104%)

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 max amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.