Radeon RX 6800 vs Radeon RX Vega 64

Intro

Compare all of that to the Radeon RX Vega 64, which features GPU core speed of 1247 MHz, and 8192 MB of HBM2 RAM set to run at 1890 MHz through a 2048-bit bus. It also features 4096 SPUs, 256 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800		250 Watts
Radeon RX Vega 64		295 Watts
	Difference: 45 Watts (18%)

Memory Bandwidth

In theory, the Radeon RX 6800 should perform just a bit faster than the Radeon RX Vega 64 in general. (explain)

Radeon RX 6800		524288 MB/sec
Radeon RX Vega 64		495411 MB/sec
	Difference: 28877 (6%)

Texel Rate

The Radeon RX 6800 is much (approximately 28%) faster with regards to AF than the Radeon RX Vega 64. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon RX Vega 64		319232 Mtexels/sec
	Difference: 88768 (28%)

Pixel Rate

The Radeon RX 6800 is a lot (more or less 104%) faster with regards to FSAA than the Radeon RX Vega 64, and able to handle higher resolutions more effectively. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon RX Vega 64		79808 Mpixels/sec
	Difference: 83392 (104%)

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 (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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