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GeForce GTX 550 Ti vs GeForce GTX 660 Ti


Intro

The GeForce GTX 550 Ti has a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1026 MHz. It also features a 192-bit memory bus, and makes use of a 40 nm design. It is made up of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.

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 features 1344 Stream Processors, 112 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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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

Theoretically speaking, the GeForce GTX 660 Ti will be 46% quicker than the GeForce GTX 550 Ti overall, because of its greater 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 should be much (approximately 256%) more effective at AF 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

If running with a high screen resolution is important to you, then the GeForce GTX 660 Ti is the winner, but it probably won't make a huge difference. (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

GeForce GTX 550 Ti

GeForce GTX 660 Ti

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 data (in units of megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling 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 video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

GeForce GTX 550 Ti

GeForce GTX 660 Ti

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