Radeon RX 6900 XT vs Radeon RX 7900 XT

Intro

Compare all that to the Radeon RX 7900 XT, which has core speeds of 1500 MHz on the GPU, and 2500 MHz on the 20480 MB of GDDR6 memory. It features 5376 SPUs along with 336 Texture Address Units and 192 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The Radeon RX 7900 XT should theoretically perform a lot faster than the Radeon RX 6900 XT overall. (explain)

Radeon RX 7900 XT		819200 MB/sec
Radeon RX 6900 XT		524288 MB/sec
	Difference: 294912 (56%)

Texel Rate

The Radeon RX 6900 XT is a little bit (about 16%) more effective at texture filtering than the Radeon RX 7900 XT. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon RX 7900 XT		504000 Mtexels/sec
	Difference: 80000 (16%)

Pixel Rate

The Radeon RX 7900 XT is much (approximately 23%) more effective at AA than the Radeon RX 6900 XT, and also capable of handling higher resolutions more effectively. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
Radeon RX 6900 XT		233600 Mpixels/sec
	Difference: 54400 (23%)

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 data (measured in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.