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GeForce GTX 660 vs GeForce GTX 980M

Intro

The GeForce GTX 660 uses 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 card. It features 960 SPUs along with 80 TAUs and 24 ROPs.

Compare all of that to the GeForce GTX 980M, which has a core clock frequency of 1038 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 64 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 980M 9476 points
GeForce GTX 660 5063 points
Difference: 4413 (87%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M 100 Watts
GeForce GTX 660 140 Watts
Difference: 40 Watts (40%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should in theory be a small bit superior to the GeForce GTX 980M in general. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 980M 128000 MB/sec
Difference: 16192 (13%)

Texel Rate

The GeForce GTX 980M will be a lot (approximately 27%) more effective at anisotropic filtering than the GeForce GTX 660. (explain)

GeForce GTX 980M 99648 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 21248 (27%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 980M is superior to the GeForce GTX 660, and very much so. (explain)

GeForce GTX 980M 66432 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 42912 (182%)

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 980M

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 660 GeForce GTX 980M
Manufacturer nVidia nVidia
Year September 2012 October 7 2014
Code Name GK106 GM204
Memory 2048 MB 4096 MB
Core Speed 980 MHz 1038 MHz
Memory Speed 6008 MHz 4000 MHz
Power (Max TDP) 140 watts 100 watts
Bandwidth 144192 MB/sec 128000 MB/sec
Texel Rate 78400 Mtexels/sec 99648 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 66432 Mpixels/sec
Unified Shaders 960 1536
Texture Mapping Units 80 96
Render Output Units 24 64
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 largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 processed per second. This figure is worked out by multiplying the total number of texture units by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 660

Amazon.com

Check prices at:

GeForce GTX 980M

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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