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GeForce GTX 550 Ti vs GeForce GTX 660 Ti


Intro

The GeForce GTX 550 Ti features a GPU core clock speed of 900 MHz, and the 1024 MB of GDDR5 memory is set to run at 1026 MHz through a 192-bit bus. It also is made up of 192 SPUs, 32 TAUs, and 24 ROPs.

Compare those specifications to the GeForce GTX 660 Ti, which comes with a core clock speed of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 192-bit memory bus, and makes use of a 28 nm design. It is comprised of 1344 SPUs, 112 Texture Address Units, and 24 Raster Operation Units.

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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 Ti 6010 points
GeForce GTX 550 Ti 1910 points
Difference: 4100 (215%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti 116 Watts
GeForce GTX 660 Ti 150 Watts
Difference: 34 Watts (29%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti is 46% faster than the GeForce GTX 550 Ti in general, because of its higher bandwidth. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 45504 (46%)

Texel Rate

The GeForce GTX 660 Ti is much (about 256%) faster with regards to texture filtering than the GeForce GTX 550 Ti. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 73680 (256%)

Pixel Rate

The GeForce GTX 660 Ti should be a bit (about 2%) better at full screen anti-aliasing than the GeForce GTX 550 Ti, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 660 Ti 21960 Mpixels/sec
GeForce GTX 550 Ti 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 550 Ti

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 550 Ti GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year March 2011 August 2012
Code Name GF116 GK104
Memory 1024 MB 2048 MB
Core Speed 900 MHz 915 MHz
Memory Speed 4104 MHz 6000 MHz
Power (Max TDP) 116 watts 150 watts
Bandwidth 98496 MB/sec 144000 MB/sec
Texel Rate 28800 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 21960 Mpixels/sec
Unified Shaders 192 1344
Texture Mapping Units 32 112
Render Output Units 24 24
Bus Type GDDR5 GDDR5
Bus Width 192-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 1170 million 3540 million
Bus PCIe 2.1 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 information (in units of megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total amount of texture units 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 550 Ti

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.

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