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GeForce GTX 460 2GB vs GeForce GTX 660

Intro

The GeForce GTX 460 2GB features core speeds of 675 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR5 memory. It features 336 SPUs as well as 56 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the GeForce GTX 660, which comes with GPU core speed of 980 MHz, and 2048 MB of GDDR5 memory set to run at 1502 MHz through a 192-bit bus. It also features 960 SPUs, 80 Texture Address Units, and 24 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 460 2GB 160 Watts
Difference: 20 Watts (14%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should theoretically be a lot better than the GeForce GTX 460 2GB overall. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 460 2GB 115200 MB/sec
Difference: 28992 (25%)

Texel Rate

The GeForce GTX 660 should be quite a bit (approximately 107%) better at AF than the GeForce GTX 460 2GB. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 460 2GB 37800 Mtexels/sec
Difference: 40600 (107%)

Pixel Rate

The GeForce GTX 660 is a bit (more or less 9%) better at full screen anti-aliasing than the GeForce GTX 460 2GB, and also will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 460 2GB 21600 Mpixels/sec
Difference: 1920 (9%)

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 460 2GB

Amazon.com

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GeForce GTX 660

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 460 2GB GeForce GTX 660
Manufacturer nVidia nVidia
Year July 2010 September 2012
Code Name GF104 GK106
Memory 2048 MB 2048 MB
Core Speed 675 MHz 980 MHz
Memory Speed 3600 MHz 6008 MHz
Power (Max TDP) 160 watts 140 watts
Bandwidth 115200 MB/sec 144192 MB/sec
Texel Rate 37800 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 336 960
Texture Mapping Units 56 80
Render Output Units 32 24
Bus Type GDDR5 GDDR5
Bus Width 256-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 1950 million 2540 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 460 2GB

Amazon.com

Check prices at:

GeForce GTX 660

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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