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GeForce GTX 550 Ti vs Radeon HD 5870

Intro

The GeForce GTX 550 Ti has a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1026 MHz. It also uses a 192-bit memory bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.

Compare all that to the Radeon HD 5870, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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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

The Radeon HD 5870 should theoretically perform a lot faster than the GeForce GTX 550 Ti overall. (explain)

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

Texel Rate

The Radeon HD 5870 is much (more or less 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 much (about 26%) more effective at anti-aliasing than the GeForce GTX 550 Ti, and also will be 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

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GeForce GTX 550 Ti

Amazon.com

Radeon HD 5870

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

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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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of 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 the texel rate, the better the video 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 amount of pixels the video card could 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 card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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