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GeForce GTX 560 vs GeForce GTX 660

Intro

The GeForce GTX 560 uses a 40 nm design. nVidia has set the core frequency at 810 MHz. The GDDR5 memory works at a frequency of 1001 MHz on this model. It features 336 SPUs as well as 56 Texture Address Units and 32 ROPs.

Compare those specs to the GeForce GTX 660, which comes with GPU core speed of 980 MHz, and 2048 MB of GDDR5 RAM set to run at 1502 MHz through a 192-bit bus. It also is made up of 960 Stream Processors, 80 TAUs, and 24 ROPs.

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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 660 5063 points
GeForce GTX 560 3030 points
Difference: 2033 (67%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 560 150 Watts
Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 will be 13% faster than the GeForce GTX 560 overall, because of its higher data rate. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 560 128128 MB/sec
Difference: 16064 (13%)

Texel Rate

The GeForce GTX 660 will be much (about 73%) better at anisotropic filtering than the GeForce GTX 560. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 560 45360 Mtexels/sec
Difference: 33040 (73%)

Pixel Rate

The GeForce GTX 560 is a little bit (approximately 10%) better at anti-aliasing than the GeForce GTX 660, and should be able to handle higher screen resolutions better. (explain)

GeForce GTX 560 25920 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 2400 (10%)

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

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GeForce GTX 560

Amazon.com

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GeForce GTX 660

Amazon.com

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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

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Model GeForce GTX 560 GeForce GTX 660
Manufacturer nVidia nVidia
Year May 2011 September 2012
Code Name GF114 GK106
Memory 1024 MB 2048 MB
Core Speed 810 MHz 980 MHz
Memory Speed 4004 MHz 6008 MHz
Power (Max TDP) 150 watts 140 watts
Bandwidth 128128 MB/sec 144192 MB/sec
Texel Rate 45360 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 25920 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 336 960
Texture Mapping Units 56 80
Render Output Units 32 24
Bus Type GDDR5 GDDR5
Bus Width 256-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 1950 million 2540 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 560

Amazon.com

Check prices at:

GeForce GTX 660

Amazon.com

Check prices at:

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.

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