Radeon RX 7900 XT vs Radeon RX Vega 56

Intro

Compare that to the Radeon RX Vega 56, which features a core clock frequency of 1156 MHz and a HBM2 memory speed of 1600 MHz. It also features a 2048-bit bus, and uses a 14 nm design. It is comprised of 3584 SPUs, 224 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the Radeon RX 7900 XT should perform a lot 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 is quite a bit (about 95%) better 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 running with high levels of AA is important to you, then the Radeon RX 7900 XT is superior to the Radeon RX Vega 56, 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 megabytes 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. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.