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GeForce GTX 470 vs GeForce GTX 660 Ti

Intro

The GeForce GTX 470 comes with a GPU clock speed of 607 MHz, and the 1280 MB of GDDR5 memory runs at 837 MHz through a 320-bit bus. It also features 448 Stream Processors, 56 Texture Address Units, and 40 ROPs.

Compare those specifications to the GeForce GTX 660 Ti, which comes with GPU clock speed of 915 MHz, and 2048 MB of GDDR5 RAM set to run at 1500 MHz through a 192-bit bus. It also is comprised of 1344 SPUs, 112 TAUs, and 24 Raster Operation Units.

(No game benchmarks for this combination yet.)

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

Theoretically, the GeForce GTX 660 Ti should 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 much (more or less 201%) faster with regards to AF than the GeForce GTX 470. (explain)

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

Pixel Rate

The GeForce GTX 470 is a small bit (about 11%) better at full screen anti-aliasing than the GeForce GTX 660 Ti, and should be able to handle higher screen resolutions without slowing down too much. (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

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

Model GeForce GTX 470 GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year March 2010 August 2012
Code Name GF100 GK104
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1280 MB 2048 MB
Core Speed 607 MHz 915 MHz
Shader Speed 1215 MHz 915 MHz
Memory Speed 837 MHz (3348 MHz effective) 1500 MHz (6000 MHz effective)
Unified Shaders 448 1344
Texture Mapping Units 56 112
Render Output Units 40 24
Bus Type GDDR5 GDDR5
Bus Width 320-bit 192-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 215 watts 150 watts
Shader Model 5.0 5.0
Bandwidth 133920 MB/sec 144000 MB/sec
Texel Rate 33992 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 21960 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

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