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GeForce GTX 550 Ti vs GeForce GTX 660 Ti

Intro

The GeForce GTX 550 Ti features a GPU core speed of 900 MHz, and the 1024 MB of GDDR5 RAM 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 clock frequency of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 192-bit bus, and makes use of a 28 nm design. It is comprised of 1344 SPUs, 112 TAUs, and 24 ROPs.

(No game benchmarks for this combination yet.)

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

The GeForce GTX 660 Ti, in theory, should perform quite a bit faster than the GeForce GTX 550 Ti in general. (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 a lot (about 256%) more effective at anisotropic 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

If running with lots of anti-aliasing is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 550 Ti, 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

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 550 Ti GeForce GTX 660 Ti
Manufacturer nVidia nVidia
Year March 2011 August 2012
Code Name GF116 GK104
Fab Process 40 nm 28 nm
Bus PCIe 2.1 x16 PCIe 3.0 x16
Memory 1024 MB 2048 MB
Core Speed 900 MHz 915 MHz
Shader Speed 1800 MHz 915 MHz
Memory Speed 1026 MHz (4104 MHz effective) 1500 MHz (6000 MHz effective)
Unified Shaders 192 1344
Texture Mapping Units 32 112
Render Output Units 24 24
Bus Type GDDR5 GDDR5
Bus Width 192-bit 192-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 116 watts 150 watts
Shader Model 5.0 5.0
Bandwidth 98496 MB/sec 144000 MB/sec
Texel Rate 28800 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 21960 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This 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 video 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 number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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