Radeon RX 6800 vs Radeon RX Vega 56

Intro

Compare all that to the Radeon RX Vega 56, which comes with GPU clock speed of 1156 MHz, and 8192 MB of HBM2 RAM running at 1600 MHz through a 2048-bit bus. It also is comprised of 3584 SPUs, 224 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 56		210 Watts
Radeon RX 6800		250 Watts
	Difference: 40 Watts (19%)

Memory Bandwidth

In theory, the Radeon RX 6800 will be 25% faster than the Radeon RX Vega 56 overall, because of its higher data rate. (explain)

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

Texel Rate

The Radeon RX 6800 should be quite a bit (approximately 58%) more effective at texture filtering than the Radeon RX Vega 56. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon RX Vega 56		258944 Mtexels/sec
	Difference: 149056 (58%)

Pixel Rate

The Radeon RX 6800 is a lot (approximately 121%) more effective at anti-aliasing than the Radeon RX Vega 56, and also will be able to handle higher resolutions more effectively. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon RX Vega 56		73984 Mpixels/sec
	Difference: 89216 (121%)

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 information (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.