GeForce RTX 3080 vs Radeon RX 6800 XT

Intro

Compare all that to the Radeon RX 6800 XT, which features a core clock frequency of 1825 MHz and a GDDR6 memory frequency of 2000 MHz. It also features a 256-bit bus, and uses a 7 nm design. It is made up of 4608 SPUs, 288 TAUs, and 128 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 XT		300 Watts
GeForce RTX 3080		320 Watts
	Difference: 20 Watts (7%)

Memory Bandwidth

In theory, the GeForce RTX 3080 should be quite a bit faster than the Radeon RX 6800 XT overall. (explain)

GeForce RTX 3080		778547 MB/sec
Radeon RX 6800 XT		524288 MB/sec
	Difference: 254259 (48%)

Texel Rate

The Radeon RX 6800 XT will be quite a bit (more or less 34%) more effective at texture filtering than the GeForce RTX 3080. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
GeForce RTX 3080		391680 Mtexels/sec
	Difference: 133920 (34%)

Pixel Rate

The Radeon RX 6800 XT is quite a bit (more or less 69%) more effective at full screen anti-aliasing than the GeForce RTX 3080, and also should be able to handle higher screen resolutions better. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
GeForce RTX 3080		138240 Mpixels/sec
	Difference: 95360 (69%)

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 max amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.