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GeForce GTX 660 vs GeForce GTX 880M

Intro

The GeForce GTX 660 comes with a GPU clock speed of 980 MHz, and the 2048 MB of GDDR5 memory is set to run at 1502 MHz through a 192-bit bus. It also is comprised of 960 SPUs, 80 TAUs, and 24 ROPs.

Compare those specs to the GeForce GTX 880M, which has core speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 TAUs and 32 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 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

Theoretically speaking, the GeForce GTX 660 should be 13% quicker than the GeForce GTX 880M overall, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 880M will be much (approximately 56%) more effective at texture filtering 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 high levels of AA 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

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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: Bandwidth is the max amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the 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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