Radeon RX 6800 XT vs Radeon RX Vega 56

Intro

Compare those specs to the Radeon RX Vega 56, which features core speeds of 1156 MHz on the GPU, and 1600 MHz on the 8192 MB of HBM2 RAM. It features 3584 SPUs along with 224 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 56		210 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 90 Watts (43%)

Memory Bandwidth

In theory, the Radeon RX 6800 XT is 25% faster than the Radeon RX Vega 56 overall, because of its greater bandwidth. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon RX Vega 56		419430 MB/sec
	Difference: 104858 (25%)

Texel Rate

The Radeon RX 6800 XT will be much (about 103%) more effective at anisotropic filtering than the Radeon RX Vega 56. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon RX Vega 56		258944 Mtexels/sec
	Difference: 266656 (103%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 6800 XT is the winner, and very much so. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon RX Vega 56		73984 Mpixels/sec
	Difference: 159616 (216%)

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 largest amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.