Radeon RX 7900 XT vs Radeon RX Vega 56

Intro

Compare those specifications to the Radeon RX Vega 56, which uses a 14 nm design. AMD has clocked the core speed at 1156 MHz. The HBM2 RAM runs at a frequency of 1600 MHz on this particular card. 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 7900 XT		300 Watts
	Difference: 90 Watts (43%)

Memory Bandwidth

In theory, the Radeon RX 7900 XT should perform much faster than the Radeon RX Vega 56 overall. (explain)

Radeon RX 7900 XT		819200 MB/sec
Radeon RX Vega 56		419430 MB/sec
	Difference: 399770 (95%)

Texel Rate

The Radeon RX 7900 XT will be a lot (about 95%) more effective at anisotropic filtering than the Radeon RX Vega 56. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
Radeon RX Vega 56		258944 Mtexels/sec
	Difference: 245056 (95%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 7900 XT is a better choice, and very much so. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
Radeon RX Vega 56		73984 Mpixels/sec
	Difference: 214016 (289%)

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 maximum amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.