GeForce GTX 980 vs Radeon RX 6600 XT

Intro

Compare those specifications to the Radeon RX 6600 XT, which comes with core speeds of 1968 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR6 memory. It features 2048 SPUs along with 128 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
GeForce GTX 980		165 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

In theory, the Radeon RX 6600 XT should be just a bit faster than the GeForce GTX 980 overall. (explain)

Radeon RX 6600 XT		262144 MB/sec
GeForce GTX 980		224000 MB/sec
	Difference: 38144 (17%)

Texel Rate

The Radeon RX 6600 XT should be quite a bit (about 75%) faster with regards to anisotropic filtering than the GeForce GTX 980. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
GeForce GTX 980		144128 Mtexels/sec
	Difference: 107776 (75%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6600 XT is superior to the GeForce GTX 980, by a large margin. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
GeForce GTX 980		72064 Mpixels/sec
	Difference: 53888 (75%)

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 information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, 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 texture units of the card by the core speed of the chip. The higher this number, the better the video 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 maximum number of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.