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GeForce GTX 560 Ti vs GeForce GTX 660 Ti

Intro

The GeForce GTX 560 Ti comes with a core clock speed of 822 MHz and a GDDR5 memory frequency of 1002 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is comprised of 384 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the GeForce GTX 660 Ti, which comes with GPU core speed of 915 MHz, and 2048 MB of GDDR5 memory set to run at 1500 MHz through a 192-bit bus. It also features 1344 Stream Processors, 112 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
GeForce GTX 560 Ti 170 Watts
Difference: 20 Watts (13%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti is 12% faster than the GeForce GTX 560 Ti overall, due to its greater bandwidth. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce GTX 560 Ti 128256 MB/sec
Difference: 15744 (12%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (more or less 95%) better at anisotropic filtering than the GeForce GTX 560 Ti. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce GTX 560 Ti 52608 Mtexels/sec
Difference: 49872 (95%)

Pixel Rate

The GeForce GTX 560 Ti will be a little bit (approximately 20%) better at AA than the GeForce GTX 660 Ti, and should be able to handle higher resolutions better. (explain)

GeForce GTX 560 Ti 26304 Mpixels/sec
GeForce GTX 660 Ti 21960 Mpixels/sec
Difference: 4344 (20%)

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

GeForce GTX 560 Ti

GeForce GTX 660 Ti

Specifications

Display Specifications

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Model GeForce GTX 560 Ti GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year January 2011 August 2012
Code Name GF114 GK104
Memory 1024 MB 2048 MB
Core Speed 822 MHz 915 MHz
Memory Speed 4008 MHz 6000 MHz
Power (Max TDP) 170 watts 150 watts
Bandwidth 128256 MB/sec 144000 MB/sec
Texel Rate 52608 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 26304 Mpixels/sec 21960 Mpixels/sec
Unified Shaders 384 1344
Texture Mapping Units 64 112
Render Output Units 32 24
Bus Type GDDR5 GDDR5
Bus Width 256-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 1950 million 3540 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

GeForce GTX 560 Ti

GeForce GTX 660 Ti

Comments

2 Responses to “GeForce GTX 560 Ti vs GeForce GTX 660 Ti”
Chris Dippenaar says:

Need a comparison between gtx 560 ti 2gb and gtx660ti 2gb please

Steven says:

Thanks for answer
and thanks for this website

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