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GeForce GTX 1080 vs GeForce GTX 660

Intro

The GeForce GTX 1080 features core speeds of 1607 MHz on the GPU, and 1251 MHz on the 8192 MB of GDDR5X memory. It features 2560 SPUs as well as 160 TAUs and 64 Rasterization Operator Units.

Compare those specs to the GeForce GTX 660, which uses a 28 nm design. nVidia has clocked the core speed at 980 MHz. The GDDR5 memory works at a frequency of 1502 MHz on this particular card. It features 960 SPUs as well as 80 TAUs and 24 Rasterization Operator Units.

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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 1080 21942 points
GeForce GTX 660 5063 points
Difference: 16879 (333%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 1080 180 Watts
Difference: 40 Watts (29%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 1080 should in theory be a lot better than the GeForce GTX 660 in general. (explain)

GeForce GTX 1080 327680 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 183488 (127%)

Texel Rate

The GeForce GTX 1080 should be a lot (more or less 228%) more effective at anisotropic filtering than the GeForce GTX 660. (explain)

GeForce GTX 1080 257120 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 178720 (228%)

Pixel Rate

The GeForce GTX 1080 should be quite a bit (about 337%) better at AA than the GeForce GTX 660, and also should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 1080 102848 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 79328 (337%)

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 1080

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 1080 GeForce GTX 660
Manufacturer nVidia nVidia
Year May 2016 September 2012
Code Name GP104-400 GK106
Memory 8192 MB 2048 MB
Core Speed 1607 MHz 980 MHz
Memory Speed 10008 MHz 6008 MHz
Power (Max TDP) 180 watts 140 watts
Bandwidth 327680 MB/sec 144192 MB/sec
Texel Rate 257120 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 102848 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 2560 960
Texture Mapping Units 160 80
Render Output Units 64 24
Bus Type GDDR5X GDDR5
Bus Width 256-bit 192-bit
Fab Process 16 nm 28 nm
Transistors 7200 million 2540 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 11.0
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range 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 texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 1080

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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