GeForce GTX 980 vs Radeon RX 6600 XT

Intro

Compare all of that to the Radeon RX 6600 XT, which comes with core clock 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

Performance-wise, the Radeon RX 6600 XT should theoretically be just a bit better 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 will be a lot (more or less 75%) faster with regards to texture 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

The Radeon RX 6600 XT should be quite a bit (more or less 75%) more effective at anti-aliasing than the GeForce GTX 980, and also should be able to handle higher resolutions more effectively. (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 max amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, 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 the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. 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 also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.