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GeForce GTX 550 Ti vs GeForce GTX 580 3GB


Intro

The GeForce GTX 550 Ti makes use of a 40 nm design. nVidia has set the core speed at 900 MHz. The GDDR5 memory works at a speed of 1026 MHz on this specific model. It features 192 SPUs along with 32 TAUs and 24 Rasterization Operator Units.

Compare those specifications to the GeForce GTX 580 3GB, which has a core clock frequency of 772 MHz and a GDDR5 memory speed of 1002 MHz. It also uses a 384-bit memory bus, and uses a 40 nm design. It features 512 SPUs, 64 TAUs, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti 116 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 128 Watts (110%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 580 3GB should in theory be quite a bit better than the GeForce GTX 550 Ti in general. (explain)

GeForce GTX 580 3GB 192384 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 93888 (95%)

Texel Rate

The GeForce GTX 580 3GB will be much (approximately 72%) more effective at AF than the GeForce GTX 550 Ti. (explain)

GeForce GTX 580 3GB 49408 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 20608 (72%)

Pixel Rate

The GeForce GTX 580 3GB will be quite a bit (about 72%) more effective at FSAA than the GeForce GTX 550 Ti, and should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 580 3GB 37056 Mpixels/sec
GeForce GTX 550 Ti 21600 Mpixels/sec
Difference: 15456 (72%)

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 580 3GB

Specifications

Display Specifications

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Model GeForce GTX 550 Ti GeForce GTX 580 3GB
Manufacturer nVidia nVidia
Year March 2011 November 2010
Code Name GF116 GF110
Memory 1024 MB 3072 MB
Core Speed 900 MHz 772 MHz
Memory Speed 4104 MHz 4008 MHz
Power (Max TDP) 116 watts 244 watts
Bandwidth 98496 MB/sec 192384 MB/sec
Texel Rate 28800 Mtexels/sec 49408 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 37056 Mpixels/sec
Unified Shaders 192 512
Texture Mapping Units 32 64
Render Output Units 24 48
Bus Type GDDR5 GDDR5
Bus Width 192-bit 384-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 3000 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one 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 number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce GTX 550 Ti

GeForce GTX 580 3GB

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