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GeForce GTX 560 Ti vs GeForce GTX 660 Ti

Intro

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

Compare that to the GeForce GTX 660 Ti, which has GPU clock speed of 915 MHz, and 2048 MB of GDDR5 RAM set to run at 1500 MHz through a 192-bit bus. It also is made up of 1344 SPUs, 112 TAUs, and 24 ROPs.

(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

Theoretically, the GeForce GTX 660 Ti should perform a little bit faster than the GeForce GTX 560 Ti in general. (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 should be much (approximately 95%) faster with regards to 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 is a small bit (about 20%) more effective at AA than the GeForce GTX 660 Ti, and also capable of handling 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

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: Bandwidth is the max amount of data (measured in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max 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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