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GeForce GTX 660 vs GeForce GTX 880M

Intro

The GeForce GTX 660 has a clock speed of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 192-bit memory bus, and uses a 28 nm design. It is made up of 960 SPUs, 80 Texture Address Units, and 24 Raster Operation Units.

Compare all that to the GeForce GTX 880M, which has a clock frequency of 954 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 Raster Operation 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 880M 6360 points
GeForce GTX 660 5063 points
Difference: 1297 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
GeForce GTX 660 140 Watts
Difference: 10 Watts (8%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should theoretically be just a bit better than the GeForce GTX 880M overall. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 16192 (13%)

Texel Rate

The GeForce GTX 880M is much (more or less 56%) more effective at AF than the GeForce GTX 660. (explain)

GeForce GTX 880M 122112 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 43712 (56%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 880M is a better choice, by far. (explain)

GeForce GTX 880M 30528 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 7008 (30%)

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 660

Amazon.com

Check prices at:

GeForce GTX 880M

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 660 GeForce GTX 880M
Manufacturer nVidia nVidia
Year September 2012 March 12 2014
Code Name GK106 GK104
Memory 2048 MB 4096 MB
Core Speed 980 MHz 954 MHz
Memory Speed 6008 MHz 4000 MHz
Power (Max TDP) 140 watts 130 watts
Bandwidth 144192 MB/sec 128000 MB/sec
Texel Rate 78400 Mtexels/sec 122112 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 30528 Mpixels/sec
Unified Shaders 960 1536
Texture Mapping Units 80 128
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2540 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 660

Amazon.com

Check prices at:

GeForce GTX 880M

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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