GeForce GTX 660 Ti vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which features core clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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 GTX 680		7650 points
GeForce GTX 660 Ti		6013 points
	Difference: 1637 (27%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Geforce GTX 680		195 Watts
	Difference: 45 Watts (30%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 is 34% faster than the GeForce GTX 660 Ti in general, due to its greater bandwidth. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 48256 (34%)

Texel Rate

The Geforce GTX 680 is quite a bit (about 26%) better at texture filtering than the GeForce GTX 660 Ti. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 26288 (26%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 680 is superior to the GeForce GTX 660 Ti, by far. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 10232 (47%)

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 transported past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 can be applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the 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 that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.