GeForce RTX 3080 vs Radeon RX 6800 XT

Intro

Compare all of that to the Radeon RX 6800 XT, which uses a 7 nm design. AMD has set the core speed at 1825 MHz. The GDDR6 RAM works at a frequency of 2000 MHz on this specific card. It features 4608 SPUs as well as 288 Texture Address Units and 128 Rasterization Operator 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

The GeForce RTX 3080 should theoretically be a lot 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 should be much (more or less 34%) more effective at AF 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 (about 69%) better at anti-aliasing than the GeForce RTX 3080, and also will be capable of handling higher screen resolutions more effectively. (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 largest amount of information (in units of megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.