GeForce RTX 2080 vs Radeon RX 6600 XT

Intro

Compare all of that to the Radeon RX 6600 XT, which has a GPU core clock speed of 1968 MHz, and 8192 MB of GDDR6 memory set to run at 2000 MHz through a 128-bit bus. It also is comprised of 2048 SPUs, 128 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
GeForce RTX 2080		215 Watts
	Difference: 55 Watts (34%)

Memory Bandwidth

In theory, the GeForce RTX 2080 is 75% faster than the Radeon RX 6600 XT overall, due to its greater bandwidth. (explain)

GeForce RTX 2080		458752 MB/sec
Radeon RX 6600 XT		262144 MB/sec
	Difference: 196608 (75%)

Texel Rate

The GeForce RTX 2080 is just a bit (about 11%) better at anisotropic filtering than the Radeon RX 6600 XT. (explain)

GeForce RTX 2080		278760 Mtexels/sec
Radeon RX 6600 XT		251904 Mtexels/sec
	Difference: 26856 (11%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 6600 XT is a better choice, by a large margin. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
GeForce RTX 2080		96960 Mpixels/sec
	Difference: 28992 (30%)

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 information (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.