GeForce RTX 2080 vs Radeon RX 6800 XT

Intro

Compare that to the Radeon RX 6800 XT, which comes with GPU core speed of 1825 MHz, and 16384 MB of GDDR6 memory running at 2000 MHz through a 256-bit bus. It also features 4608 SPUs, 288 Texture Address Units, and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 2080		215 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 85 Watts (40%)

Memory Bandwidth

The Radeon RX 6800 XT should in theory be a small bit faster than the GeForce RTX 2080 overall. (explain)

Radeon RX 6800 XT		524288 MB/sec
GeForce RTX 2080		458752 MB/sec
	Difference: 65536 (14%)

Texel Rate

The Radeon RX 6800 XT should be much (about 89%) better at AF than the GeForce RTX 2080. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
GeForce RTX 2080		278760 Mtexels/sec
	Difference: 246840 (89%)

Pixel Rate

The Radeon RX 6800 XT will be much (about 141%) more effective at AA than the GeForce RTX 2080, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
GeForce RTX 2080		96960 Mpixels/sec
	Difference: 136640 (141%)

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 moved over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.