Radeon RX 6900 XT vs Radeon RX Vega 56

Intro

Compare all of that to the Radeon RX Vega 56, which has clock speeds of 1156 MHz on the GPU, and 1600 MHz on the 8192 MB of HBM2 RAM. It features 3584 SPUs as well as 224 Texture Address Units 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 6900 XT		300 Watts
	Difference: 90 Watts (43%)

Memory Bandwidth

Performance-wise, the Radeon RX 6900 XT should theoretically be much better than the Radeon RX Vega 56 in general. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon RX Vega 56		419430 MB/sec
	Difference: 104858 (25%)

Texel Rate

The Radeon RX 6900 XT should be a lot (more or less 126%) more effective at AF than the Radeon RX Vega 56. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon RX Vega 56		258944 Mtexels/sec
	Difference: 325056 (126%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 6900 XT is the winner, and very much so. (explain)

Radeon RX 6900 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 (in units of MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.