Radeon RX 7900 XTX 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 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

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 56		210 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 145 Watts (69%)

Memory Bandwidth

As far as performance goes, the Radeon RX 7900 XTX should theoretically be much better than the Radeon RX Vega 56 in general. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon RX Vega 56		419430 MB/sec
	Difference: 563610 (134%)

Texel Rate

The Radeon RX 7900 XTX is quite a bit (approximately 175%) more effective at texture filtering than the Radeon RX Vega 56. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon RX Vega 56		258944 Mtexels/sec
	Difference: 453376 (175%)

Pixel Rate

The Radeon RX 7900 XTX should be a lot (approximately 381%) faster with regards to full screen anti-aliasing than the Radeon RX Vega 56, and should be able to handle higher resolutions while still performing well. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon RX Vega 56		73984 Mpixels/sec
	Difference: 282176 (381%)

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 maximum amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a 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 outputting the pixels (image) to 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 potential to get to the max fill rate.