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GeForce GTX 660 vs GeForce GTX 980

Intro

The GeForce GTX 660 has core clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 960 SPUs as well as 80 Texture Address Units and 24 ROPs.

Compare those specs to the GeForce GTX 980, which features GPU clock speed of 1126 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 64 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 980 13552 points
GeForce GTX 660 5063 points
Difference: 8489 (168%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 980 165 Watts
Difference: 25 Watts (18%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980 should theoretically be much better than the GeForce GTX 660 overall. (explain)

GeForce GTX 980 224000 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 79808 (55%)

Texel Rate

The GeForce GTX 980 should be quite a bit (about 84%) more effective at anisotropic filtering than the GeForce GTX 660. (explain)

GeForce GTX 980 144128 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 65728 (84%)

Pixel Rate

The GeForce GTX 980 will be much (more or less 206%) better at FSAA than the GeForce GTX 660, and also should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 980 72064 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 48544 (206%)

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

GeForce GTX 980

Amazon.com

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 980
Manufacturer nVidia nVidia
Year September 2012 September 2014
Code Name GK106 GM204-400
Memory 2048 MB 4096 MB
Core Speed 980 MHz 1126 MHz
Memory Speed 6008 MHz 7000 MHz
Power (Max TDP) 140 watts 165 watts
Bandwidth 144192 MB/sec 224000 MB/sec
Texel Rate 78400 Mtexels/sec 144128 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 72064 Mpixels/sec
Unified Shaders 960 2048
Texture Mapping Units 80 128
Render Output Units 24 64
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2540 million 5200 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock 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 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 can be processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 660

Amazon.com

GeForce GTX 980

Amazon.com

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.

Comments

One Response to “GeForce GTX 660 vs GeForce GTX 980”
banderoz says:

GeForce GTX 980 have DirectX 12 not DirectX 11.2

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