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GeForce GTX 460 vs GeForce GTX 660


Intro

The GeForce GTX 460 has a GPU clock speed of 675 MHz, and the 768 MB of GDDR5 RAM is set to run at 900 MHz through a 192-bit bus. It also is made up of 336 Stream Processors, 56 Texture Address Units, and 24 Raster Operation Units.

Compare all that to the GeForce GTX 660, which features a core clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also features a 192-bit bus, and uses a 28 nm design. It features 960 SPUs, 80 TAUs, and 24 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 660 5090 points
GeForce GTX 460 2560 points
Difference: 2530 (99%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 460 150 Watts
Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should perform much faster than the GeForce GTX 460 in general. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 460 86400 MB/sec
Difference: 57792 (67%)

Texel Rate

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

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 660 is the winner, by far. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 460 16200 Mpixels/sec
Difference: 7320 (45%)

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

GeForce GTX 460

GeForce GTX 660

Specifications

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Model GeForce GTX 460 GeForce GTX 660
Manufacturer nVidia nVidia
Year July 2010 September 2012
Code Name GF104 GK106
Memory 768 MB 2048 MB
Core Speed 675 MHz 980 MHz
Memory Speed 3600 MHz 6008 MHz
Power (Max TDP) 150 watts 140 watts
Bandwidth 86400 MB/sec 144192 MB/sec
Texel Rate 37800 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 336 960
Texture Mapping Units 56 80
Render Output Units 24 24
Bus Type GDDR5 GDDR5
Bus Width 192-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: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce GTX 460

GeForce GTX 660

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