GeForce RTX 3080 12 GB vs Radeon RX 7900 XT

Intro

Compare that to the Radeon RX 7900 XT, which has a GPU core clock speed of 1500 MHz, and 20480 MB of GDDR6 RAM running at 2500 MHz through a 320-bit bus. It also is made up of 5376 Stream Processors, 336 TAUs, and 192 Raster Operation Units.

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

As far as performance goes, the GeForce RTX 3080 12 GB should in theory be a little bit superior to the Radeon RX 7900 XT in general. (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 should be quite a bit (approximately 43%) faster with regards to AF 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

The Radeon RX 7900 XT should be quite a bit (approximately 104%) more effective at AA than the GeForce RTX 3080 12 GB, and also will be able to handle higher resolutions without slowing down too much. (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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.