GeForce RTX 3080 vs Radeon RX 6800

Intro

Compare those specs to the Radeon RX 6800, which has a GPU core clock speed of 1700 MHz, and 16384 MB of GDDR6 memory running at 2000 MHz through a 256-bit bus. It also is comprised of 3840 SPUs, 240 Texture Address Units, and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800		250 Watts
GeForce RTX 3080		320 Watts
	Difference: 70 Watts (28%)

Memory Bandwidth

Theoretically, the GeForce RTX 3080 should be much faster than the Radeon RX 6800 in general. (explain)

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

Texel Rate

The Radeon RX 6800 is a little bit (approximately 4%) better at texture filtering than the GeForce RTX 3080. (explain)

Radeon RX 6800		408000 Mtexels/sec
GeForce RTX 3080		391680 Mtexels/sec
	Difference: 16320 (4%)

Pixel Rate

The Radeon RX 6800 should be a bit (approximately 18%) faster with regards to anti-aliasing than the GeForce RTX 3080, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 6800		163200 Mpixels/sec
GeForce RTX 3080		138240 Mpixels/sec
	Difference: 24960 (18%)

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 (counted in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated 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 applied per second.

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