GeForce GTX 1080 vs Radeon RX 6650 XT

Intro

Compare those specs to the Radeon RX 6650 XT, which has a GPU core clock speed of 2055 MHz, and 8192 MB of GDDR6 memory set to run at 2190 MHz through a 128-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, 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 GTX 1080		180 Watts
	Difference: 4 Watts (2%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 1080 will be 14% faster than the Radeon RX 6650 XT in general, due to its higher data rate. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 40608 (14%)

Texel Rate

The Radeon RX 6650 XT will be a bit (approximately 2%) more effective at texture filtering than the GeForce GTX 1080. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
GeForce GTX 1080		257120 Mtexels/sec
	Difference: 5920 (2%)

Pixel Rate

The Radeon RX 6650 XT will be much (more or less 28%) more effective at AA than the GeForce GTX 1080, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
GeForce GTX 1080		102848 Mpixels/sec
	Difference: 28672 (28%)

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 largest amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.