Radeon RX 6800 XT vs Radeon RX 7900 XTX

Intro

Compare that to the Radeon RX 7900 XTX, which has core clock speeds of 1855 MHz on the GPU, and 2500 MHz on the 24576 MB of GDDR6 memory. It features 6144 SPUs as well as 384 Texture Address Units and 192 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 XT		300 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 55 Watts (18%)

Memory Bandwidth

Theoretically, the Radeon RX 7900 XTX should be quite a bit faster than the Radeon RX 6800 XT in general. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon RX 6800 XT		524288 MB/sec
	Difference: 458752 (88%)

Texel Rate

The Radeon RX 7900 XTX is a lot (about 36%) more effective at texture filtering than the Radeon RX 6800 XT. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon RX 6800 XT		525600 Mtexels/sec
	Difference: 186720 (36%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 7900 XTX is superior to the Radeon RX 6800 XT, by far. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon RX 6800 XT		233600 Mpixels/sec
	Difference: 122560 (52%)

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 max amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its 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 the core 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 of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.