Radeon RX 7900 XTX vs Radeon VII

Intro

Compare those specs to the Radeon VII, which features a clock speed of 1400 MHz and a HBM2 memory speed of 1000 MHz. It also makes use of a 4096-bit memory bus, and makes use of a 7 nm design. It is comprised of 3840 SPUs, 240 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon VII		295 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 60 Watts (20%)

Memory Bandwidth

As far as performance goes, the Radeon VII should in theory be just a bit superior to the Radeon RX 7900 XTX overall. (explain)

Radeon VII		1048576 MB/sec
Radeon RX 7900 XTX		983040 MB/sec
	Difference: 65536 (7%)

Texel Rate

The Radeon RX 7900 XTX is much (more or less 112%) more effective at AF than the Radeon VII. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon VII		336000 Mtexels/sec
	Difference: 376320 (112%)

Pixel Rate

The Radeon RX 7900 XTX should be much (more or less 298%) more effective at AA than the Radeon VII, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon VII		89600 Mpixels/sec
	Difference: 266560 (298%)

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 MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.