GeForce RTX 3080 12 GB vs Radeon RX 7900 XT

Intro

Compare those specifications to the Radeon RX 7900 XT, which features clock speeds of 1500 MHz on the GPU, and 2500 MHz on the 20480 MB of GDDR6 RAM. It features 5376 SPUs along with 336 TAUs and 192 ROPs.

Display Graphs

Hide Graphs

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

The GeForce RTX 3080 12 GB should theoretically perform a bit faster than 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 is quite a bit (more or less 43%) faster with regards to 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

The Radeon RX 7900 XT should be quite a bit (approximately 104%) more effective at FSAA than the GeForce RTX 3080 12 GB, and also will be capable of handling higher resolutions more effectively. (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 maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.