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GeForce GTX 560 vs GeForce GTX 660

Intro

The GeForce GTX 560 comes with a GPU clock speed of 810 MHz, and the 1024 MB of GDDR5 RAM runs at 1001 MHz through a 256-bit bus. It also is made up of 336 SPUs, 56 Texture Address Units, and 32 ROPs.

Compare those specifications to the GeForce GTX 660, which comes with a clock speed of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also features a 192-bit bus, and makes use of a 28 nm design. It is comprised of 960 SPUs, 80 Texture Address Units, 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

In theory, the GeForce GTX 660 is 13% faster than the GeForce GTX 560 overall, due to 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 is a lot (more or less 73%) more effective 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

If running with lots of anti-aliasing is important to you, then the GeForce GTX 560 is superior to the GeForce GTX 660, but it probably won't make a huge difference. (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

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.

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 largest amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units 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 - the lower the memory bandwidth is, the lower the potential to reach the maximum 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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