GeForce GTX 660 vs GeForce RTX 2080 SUPER

Intro

Compare those specifications to the GeForce RTX 2080 SUPER, which features a GPU core clock speed of 1650 MHz, and 8192 MB of GDDR6 memory set to run at 1937 MHz through a 256-bit bus. It also is made up of 3072 Stream Processors, 192 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
GeForce RTX 2080 SUPER		250 Watts
	Difference: 110 Watts (79%)

Memory Bandwidth

Performance-wise, the GeForce RTX 2080 SUPER should theoretically be a lot superior to the GeForce GTX 660 in general. (explain)

GeForce RTX 2080 SUPER		507904 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 363712 (252%)

Texel Rate

The GeForce RTX 2080 SUPER is a lot (approximately 304%) better at AF than the GeForce GTX 660. (explain)

GeForce RTX 2080 SUPER		316800 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 238400 (304%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce RTX 2080 SUPER is a better choice, and very much so. (explain)

GeForce RTX 2080 SUPER		105600 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 82080 (349%)

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 (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.