GeForce RTX 3080 12 GB vs Radeon RX 6650 XT

Intro

Compare those specifications to the Radeon RX 6650 XT, which has clock speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 174 Watts (99%)

Memory Bandwidth

The GeForce RTX 3080 12 GB, in theory, should perform a lot faster than the Radeon RX 6650 XT in general. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 647226 (225%)

Texel Rate

The GeForce RTX 3080 12 GB is quite a bit (approximately 34%) faster with regards to AF than the Radeon RX 6650 XT. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon RX 6650 XT		263040 Mtexels/sec
	Difference: 89760 (34%)

Pixel Rate

The GeForce RTX 3080 12 GB will be a small bit (about 7%) more effective at full screen anti-aliasing than the Radeon RX 6650 XT, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon RX 6650 XT		131520 Mpixels/sec
	Difference: 9600 (7%)

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 (measured in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.