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GeForce GTX 550 Ti vs Radeon HD 5870


Intro

The GeForce GTX 550 Ti has a GPU core clock speed of 900 MHz, and the 1024 MB of GDDR5 memory is set to run at 1026 MHz through a 192-bit bus. It also is made up of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.

Compare all that to the Radeon HD 5870, which features a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is made up of 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti 116 Watts
Radeon HD 5870 188 Watts
Difference: 72 Watts (62%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 will be 56% quicker than the GeForce GTX 550 Ti overall, because of its greater data rate. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 55104 (56%)

Texel Rate

The Radeon HD 5870 should be a lot (about 136%) better at AF than the GeForce GTX 550 Ti. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 39200 (136%)

Pixel Rate

The Radeon HD 5870 will be a lot (about 26%) better at FSAA than the GeForce GTX 550 Ti, and capable of handling higher resolutions more effectively. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 550 Ti 21600 Mpixels/sec
Difference: 5600 (26%)

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

Radeon HD 5870

Specifications

Display Specifications

Hide Specifications

Model GeForce GTX 550 Ti Radeon HD 5870
Manufacturer nVidia AMD
Year March 2011 September 23, 2009
Code Name GF116 Cypress XT
Memory 1024 MB 1024 MB
Core Speed 900 MHz 850 MHz
Memory Speed 4104 MHz 4800 MHz
Power (Max TDP) 116 watts 188 watts
Bandwidth 98496 MB/sec 153600 MB/sec
Texel Rate 28800 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 192 1600(320x5)
Texture Mapping Units 32 80
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 2154 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

GeForce GTX 550 Ti

Radeon HD 5870

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