Radeon RX 7900 XT vs Radeon RX Vega 56

Intro

Compare all of that to the Radeon RX Vega 56, which has a clock speed of 1156 MHz and a HBM2 memory speed of 1600 MHz. It also makes use of a 2048-bit memory bus, and uses a 14 nm design. It is comprised of 3584 SPUs, 224 Texture Address Units, 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 be 95% quicker than the Radeon RX Vega 56 overall, due to its higher data rate. (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 a lot (approximately 95%) more effective at AF 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

The Radeon RX 7900 XT will be much (more or less 289%) more effective at FSAA than the Radeon RX Vega 56, and will be capable of handling higher screen resolutions better. (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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock 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 output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.