GeForce GTX 580 3GB vs Radeon RX 6600 XT

Intro

Compare those specs to the Radeon RX 6600 XT, which comes with GPU clock speed of 1968 MHz, and 8192 MB of GDDR6 RAM running at 2000 MHz through a 128-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 84 Watts (53%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6600 XT should in theory be a lot superior to the GeForce GTX 580 3GB overall. (explain)

Radeon RX 6600 XT		262144 MB/sec
GeForce GTX 580 3GB		192384 MB/sec
	Difference: 69760 (36%)

Texel Rate

The Radeon RX 6600 XT is a lot (about 410%) more effective at AF than the GeForce GTX 580 3GB. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 202496 (410%)

Pixel Rate

The Radeon RX 6600 XT is quite a bit (about 240%) more effective at anti-aliasing than the GeForce GTX 580 3GB, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
GeForce GTX 580 3GB		37056 Mpixels/sec
	Difference: 88896 (240%)

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 maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.