Radeon RX 6600 vs Radeon RX 7900 XT

Intro

Compare all of that to the Radeon RX 7900 XT, which has a GPU core clock speed of 1500 MHz, and 20480 MB of GDDR6 memory set to run at 2500 MHz through a 320-bit bus. It also is made up of 5376 SPUs, 336 Texture Address Units, and 192 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600		132 Watts
Radeon RX 7900 XT		300 Watts
	Difference: 168 Watts (127%)

Memory Bandwidth

In theory, the Radeon RX 7900 XT is 257% quicker than the Radeon RX 6600 overall, due to its greater bandwidth. (explain)

Radeon RX 7900 XT		819200 MB/sec
Radeon RX 6600		229376 MB/sec
	Difference: 589824 (257%)

Texel Rate

The Radeon RX 7900 XT will be a lot (more or less 177%) faster with regards to anisotropic filtering than the Radeon RX 6600. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
Radeon RX 6600		182112 Mtexels/sec
	Difference: 321888 (177%)

Pixel Rate

The Radeon RX 7900 XT should be a lot (approximately 177%) more effective at anti-aliasing than the Radeon RX 6600, and will be able to handle higher resolutions while still performing well. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
Radeon RX 6600		104064 Mpixels/sec
	Difference: 183936 (177%)

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 megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 ability to reach the max fill rate.