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GeForce GTX 560 vs GeForce GTX 660

Intro

The GeForce GTX 560 features a core clock speed of 810 MHz and a GDDR5 memory speed of 1001 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 336 SPUs, 56 TAUs, and 32 Raster Operation Units.

Compare that to the GeForce GTX 660, which makes use of a 28 nm design. nVidia has clocked the core speed at 980 MHz. The GDDR5 memory is set to run at a speed of 1502 MHz on this specific card. It features 960 SPUs along with 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

As far as performance goes, the GeForce GTX 660 should in theory be just a bit better than the GeForce GTX 560 in general. (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 (approximately 73%) better at texture 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 AA than the GeForce GTX 660, and also should be able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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