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GeForce GTX 280 vs GeForce GTX 550 Ti

Intro

The GeForce GTX 280 has a core clock frequency of 602 MHz and a GDDR3 memory speed of 1107 MHz. It also uses a 512-bit memory bus, and makes use of a 65 nm design. It is made up of 240 SPUs, 80 Texture Address Units, and 32 ROPs.

Compare those specifications to the GeForce GTX 550 Ti, which has a core clock speed of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also uses a 192-bit bus, and uses a 40 nm design. It features 192 SPUs, 32 TAUs, 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

In theory, the GeForce GTX 280 should be a lot 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 is a lot (approximately 67%) faster with regards to AF 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 running with high levels of AA is important to you, then the GeForce GTX 550 Ti is superior to the GeForce GTX 280, but 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 largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video 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 number of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

GeForce GTX 280

GeForce GTX 550 Ti

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