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GeForce GTX 560 Ti vs GeForce GTX 660 Ti

Intro

The GeForce GTX 560 Ti uses a 40 nm design. nVidia has clocked the core speed at 822 MHz. The GDDR5 RAM works at a frequency of 1002 MHz on this specific model. It features 384 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the GeForce GTX 660 Ti, which features GPU core speed of 915 MHz, and 2048 MB of GDDR5 RAM running at 1500 MHz through a 192-bit bus. It also is comprised of 1344 Stream Processors, 112 Texture Address Units, and 24 Raster Operation Units.

(No game benchmarks for this combination yet.)

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% quicker than the GeForce GTX 560 Ti overall, because of its greater data rate. (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 will be much (more or less 95%) better at AF 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

If running with a high screen resolution is important to you, then the GeForce GTX 560 Ti is superior to the GeForce GTX 660 Ti, though not by far. (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

Amazon.com

GeForce GTX 660 Ti

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce GTX 560 Ti GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year January 2011 August 2012
Code Name GF114 GK104
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1024 MB 2048 MB
Core Speed 822 MHz 915 MHz
Shader Speed 1645 MHz 915 MHz
Memory Speed 1002 MHz (4008 MHz effective) 1500 MHz (6000 MHz effective)
Unified Shaders 384 1344
Texture Mapping Units 64 112
Render Output Units 32 24
Bus Type GDDR5 GDDR5
Bus Width 256-bit 192-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 170 watts 150 watts
Shader Model 5.0 5.0
Bandwidth 128256 MB/sec 144000 MB/sec
Texel Rate 52608 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 26304 Mpixels/sec 21960 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to reach the maximum fill rate.

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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