Radeon RX 6600 XT vs Radeon RX 7900 XTX

Intro

Compare those specifications to the Radeon RX 7900 XTX, which comes with clock speeds of 1855 MHz on the GPU, and 2500 MHz on the 24576 MB of GDDR6 RAM. It features 6144 SPUs along with 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 6600 XT		160 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 195 Watts (122%)

Memory Bandwidth

Performance-wise, the Radeon RX 7900 XTX should in theory be quite a bit superior to the Radeon RX 6600 XT overall. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon RX 6600 XT		262144 MB/sec
	Difference: 720896 (275%)

Texel Rate

The Radeon RX 7900 XTX is a lot (more or less 183%) better at anisotropic filtering than the Radeon RX 6600 XT. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon RX 6600 XT		251904 Mtexels/sec
	Difference: 460416 (183%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 7900 XTX is superior to the Radeon RX 6600 XT, by far. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon RX 6600 XT		125952 Mpixels/sec
	Difference: 230208 (183%)

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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.