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GeForce GTX 470 vs GeForce GTX 660 Ti

Intro

The GeForce GTX 470 comes with a GPU core speed of 607 MHz, and the 1280 MB of GDDR5 RAM runs at 837 MHz through a 320-bit bus. It also is made up of 448 SPUs, 56 TAUs, and 40 Raster Operation Units.

Compare all that to the GeForce GTX 660 Ti, which makes use of a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this particular model. It features 1344 SPUs as well as 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
GeForce GTX 470 215 Watts
Difference: 65 Watts (43%)

Memory Bandwidth

The GeForce GTX 660 Ti should in theory be a bit faster than the GeForce GTX 470 in general. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce GTX 470 133920 MB/sec
Difference: 10080 (8%)

Texel Rate

The GeForce GTX 660 Ti is a lot (about 201%) better at anisotropic filtering than the GeForce GTX 470. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 68488 (201%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 470 is the winner, but not by far. (explain)

GeForce GTX 470 24280 Mpixels/sec
GeForce GTX 660 Ti 21960 Mpixels/sec
Difference: 2320 (11%)

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 470

GeForce GTX 660 Ti

Specifications

Display Specifications

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Model GeForce GTX 470 GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year March 2010 August 2012
Code Name GF100 GK104
Memory 1280 MB 2048 MB
Core Speed 607 MHz 915 MHz
Memory Speed 3348 MHz 6000 MHz
Power (Max TDP) 215 watts 150 watts
Bandwidth 133920 MB/sec 144000 MB/sec
Texel Rate 33992 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 21960 Mpixels/sec
Unified Shaders 448 1344
Texture Mapping Units 56 112
Render Output Units 40 24
Bus Type GDDR5 GDDR5
Bus Width 320-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 3540 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 largest amount of data (measured in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

GeForce GTX 470

GeForce GTX 660 Ti

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