GeForce GTX 660 vs GeForce RTX 2080 Ti

Intro

Compare those specs to the GeForce RTX 2080 Ti, which comes with a clock speed of 1350 MHz and a GDDR6 memory frequency of 1750 MHz. It also uses a 352-bit memory bus, and makes use of a 12 nm design. It is comprised of 4352 SPUs, 272 TAUs, and 88 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce RTX 2080 Ti		31381 points
GeForce GTX 660		5063 points
	Difference: 26318 (520%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
GeForce RTX 2080 Ti		250 Watts
	Difference: 110 Watts (79%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 2080 Ti should be 337% faster than the GeForce GTX 660 in general, because of its higher bandwidth. (explain)

GeForce RTX 2080 Ti		630784 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 486592 (337%)

Texel Rate

The GeForce RTX 2080 Ti will be quite a bit (more or less 368%) faster with regards to AF than the GeForce GTX 660. (explain)

GeForce RTX 2080 Ti		367200 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 288800 (368%)

Pixel Rate

The GeForce RTX 2080 Ti should be much (about 405%) faster with regards to AA than the GeForce GTX 660, and also able to handle higher screen resolutions better. (explain)

GeForce RTX 2080 Ti		118800 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 95280 (405%)

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 data (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 - the lower the bandwidth is, the lower the potential to get to the max fill rate.