GeForce RTX 3080 vs Radeon RX 6800

Intro

Compare those specifications to the Radeon RX 6800, which features a clock frequency of 1700 MHz and a GDDR6 memory frequency of 2000 MHz. It also uses a 256-bit memory bus, and uses a 7 nm design. It features 3840 SPUs, 240 TAUs, and 96 Raster Operation Units.

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 speaking, the GeForce RTX 3080 should perform a lot 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 will be a little bit (approximately 4%) better at AF 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 is a small bit (more or less 18%) faster with regards to anti-aliasing than the GeForce RTX 3080, and also should be able to handle higher resolutions while still performing well. (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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at 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 the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.