Radeon RX 6900 XT vs Radeon RX Vega 56

Intro

Compare those specs to the Radeon RX Vega 56, which makes use of a 14 nm design. AMD has clocked the core frequency at 1156 MHz. The HBM2 RAM runs at a frequency of 1600 MHz on this specific model. 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 6900 XT		300 Watts
	Difference: 90 Watts (43%)

Memory Bandwidth

Performance-wise, the Radeon RX 6900 XT should theoretically be quite a bit 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 quite a bit (about 126%) faster with regards to texture filtering 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 using a high screen resolution is important to you, then the Radeon RX 6900 XT is the winner, by far. (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: Bandwidth is the max amount of information (measured in MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the 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 card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.