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GeForce GTX 660 vs GeForce GTX 980

Intro

The GeForce GTX 660 comes with a GPU clock speed of 980 MHz, and the 2048 MB of GDDR5 memory runs at 1502 MHz through a 192-bit bus. It also features 960 Stream Processors, 80 Texture Address Units, and 24 Raster Operation Units.

Compare all of that to the GeForce GTX 980, which has GPU core 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 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 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

Theoretically speaking, the GeForce GTX 980 should perform quite a bit faster 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 is much (approximately 84%) faster with regards to AF 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 should be quite a bit (approximately 206%) faster with regards to FSAA than the GeForce GTX 660, and also should be capable of handling higher resolutions better. (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

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GeForce GTX 980

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 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: Bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 660

Amazon.com

Check prices at:

GeForce GTX 980

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.

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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