GeForce GTX 660 Ti vs Radeon RX 6800 XT

Intro

Compare that to the Radeon RX 6800 XT, which has GPU core speed of 1825 MHz, and 16384 MB of GDDR6 memory running at 2000 MHz through a 256-bit bus. It also features 4608 SPUs, 288 TAUs, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 150 Watts (100%)

Memory Bandwidth

In theory, the Radeon RX 6800 XT will be 264% quicker than the GeForce GTX 660 Ti in general, because of its higher bandwidth. (explain)

Radeon RX 6800 XT		524288 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 380288 (264%)

Texel Rate

The Radeon RX 6800 XT will be quite a bit (more or less 413%) better at texture filtering than the GeForce GTX 660 Ti. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 423120 (413%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6800 XT is a better choice, and very much so. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 211640 (964%)

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 moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many 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.