GeForce GTX 660 vs Radeon RX 5600 XT

Intro

Compare those specifications to the Radeon RX 5600 XT, which features a GPU core clock speed of 1375 MHz, and 6144 MB of GDDR6 memory running at 1500 MHz through a 192-bit bus. It also features 2304 Stream Processors, 144 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon RX 5600 XT		160 Watts
	Difference: 20 Watts (14%)

Memory Bandwidth

In theory, the Radeon RX 5600 XT should be much faster than the GeForce GTX 660 overall. (explain)

Radeon RX 5600 XT		344064 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 199872 (139%)

Texel Rate

The Radeon RX 5600 XT is a lot (about 153%) more effective at anisotropic filtering than the GeForce GTX 660. (explain)

Radeon RX 5600 XT		198000 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 119600 (153%)

Pixel Rate

The Radeon RX 5600 XT should be quite a bit (about 274%) more effective at full screen anti-aliasing than the GeForce GTX 660, and also should be able to handle higher screen resolutions better. (explain)

Radeon RX 5600 XT		88000 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 64480 (274%)

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 maximum amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better 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 per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.