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GeForce GTX 280 vs GeForce GTX 550 Ti


Intro

The GeForce GTX 280 comes with a GPU core speed of 602 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1107 MHz through a 512-bit bus. It also is made up of 240 Stream Processors, 80 Texture Address Units, and 32 Raster Operation Units.

Compare that to the GeForce GTX 550 Ti, which features a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1026 MHz. It also uses a 192-bit bus, and makes use of a 40 nm design. It is made up of 192 SPUs, 32 Texture Address Units, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti 116 Watts
GeForce GTX 280 236 Watts
Difference: 120 Watts (103%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 should be much faster than the GeForce GTX 550 Ti in general. (explain)

GeForce GTX 280 141696 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 43200 (44%)

Texel Rate

The GeForce GTX 280 should be quite a bit (approximately 67%) more effective at anisotropic filtering than the GeForce GTX 550 Ti. (explain)

GeForce GTX 280 48160 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 19360 (67%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 550 Ti is superior to the GeForce GTX 280, though not by far. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
GeForce GTX 280 19264 Mpixels/sec
Difference: 2336 (12%)

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 280

GeForce GTX 550 Ti

Specifications

Display Specifications

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Model GeForce GTX 280 GeForce GTX 550 Ti
Manufacturer nVidia nVidia
Year June 17, 2008 March 2011
Code Name G200 GF116
Memory 1024 MB 1024 MB
Core Speed 602 MHz 900 MHz
Memory Speed 2214 MHz 4104 MHz
Power (Max TDP) 236 watts 116 watts
Bandwidth 141696 MB/sec 98496 MB/sec
Texel Rate 48160 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 21600 Mpixels/sec
Unified Shaders 240 192
Texture Mapping Units 80 32
Render Output Units 32 24
Bus Type GDDR3 GDDR5
Bus Width 512-bit 192-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 1170 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

GeForce GTX 280

GeForce GTX 550 Ti

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