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GeForce GTX 460 1GB vs GeForce GTX 660 Ti

Intro

The GeForce GTX 460 1GB features a core clock speed of 675 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is made up of 336 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare all that to the GeForce GTX 660 Ti, which makes use of a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory works at a speed of 1500 MHz on this particular card. It features 1344 SPUs along with 112 TAUs and 24 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
GeForce GTX 460 1GB 160 Watts
Difference: 10 Watts (7%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti should be much faster than the GeForce GTX 460 1GB in general. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 28800 (25%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (about 171%) more effective at AF than the GeForce GTX 460 1GB. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce GTX 460 1GB 37800 Mtexels/sec
Difference: 64680 (171%)

Pixel Rate

The GeForce GTX 660 Ti is a bit (approximately 2%) more effective at FSAA than the GeForce GTX 460 1GB, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 660 Ti 21960 Mpixels/sec
GeForce GTX 460 1GB 21600 Mpixels/sec
Difference: 360 (2%)

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 1GB

Amazon.com

GeForce GTX 660 Ti

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 460 1GB GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year July 2010 August 2012
Code Name GF104 GK104
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1024 MB 2048 MB
Core Speed 675 MHz 915 MHz
Shader Speed 1350 MHz 915 MHz
Memory Speed 3600 MHz 6000 MHz
Unified Shaders 336 1344
Texture Mapping Units 56 112
Render Output Units 32 24
Bus Type GDDR5 GDDR5
Bus Width 256-bit 192-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 160 watts 150 watts
Shader Model 5.0 5.0
Bandwidth 115200 MB/sec 144000 MB/sec
Texel Rate 37800 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 21960 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Comments

One Response to “GeForce GTX 460 1GB vs GeForce GTX 660 Ti”

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