Radeon RX 580 vs Radeon RX 6800

Intro

Compare that to the Radeon RX 6800, which comes with a GPU core clock speed of 1700 MHz, and 16384 MB of GDDR6 memory set to run at 2000 MHz through a 256-bit bus. It also is comprised of 3840 Stream Processors, 240 Texture Address Units, and 96 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
Radeon RX 6800		250 Watts
	Difference: 65 Watts (35%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 is 100% quicker than the Radeon RX 580 in general, due to its greater data rate. (explain)

Radeon RX 6800		524288 MB/sec
Radeon RX 580		262144 MB/sec
	Difference: 262144 (100%)

Texel Rate

The Radeon RX 6800 will be quite a bit (approximately 125%) better at AF than the Radeon RX 580. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon RX 580		181008 Mtexels/sec
	Difference: 226992 (125%)

Pixel Rate

The Radeon RX 6800 is a lot (approximately 306%) better at anti-aliasing than the Radeon RX 580, and also will be able to handle higher resolutions better. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon RX 580		40224 Mpixels/sec
	Difference: 122976 (306%)

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 data (counted in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should 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 anti-aliasing, High Dynamic Range and high resolutions.

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

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