GeForce RTX 3080 12 GB vs Radeon RX 6650 XT

Intro

Compare all that to the Radeon RX 6650 XT, which features a core clock frequency of 2055 MHz and a GDDR6 memory speed of 2190 MHz. It also makes use of a 128-bit memory bus, and uses a 7 nm design. It is made up of 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

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

Theoretically speaking, the GeForce RTX 3080 12 GB should be 225% faster than the Radeon RX 6650 XT overall, because of its greater data rate. (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 will be much (about 34%) better at texture filtering 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

If using a high resolution is important to you, then the GeForce RTX 3080 12 GB is a better choice, but it probably won't make a huge difference. (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: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.