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GeForce GTX 550 Ti vs Radeon HD 5770


Intro

The GeForce GTX 550 Ti has core clock speeds of 900 MHz on the GPU, and 1026 MHz on the 1024 MB of GDDR5 memory. It features 192 SPUs as well as 32 TAUs and 24 ROPs.

Compare that to the Radeon HD 5770, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 RAM set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 8 Watts (7%)

Memory Bandwidth

In theory, the GeForce GTX 550 Ti is 28% faster than the Radeon HD 5770 in general, because of its higher data rate. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 21696 (28%)

Texel Rate

The Radeon HD 5770 should be a little bit (more or less 18%) better at texture filtering than the GeForce GTX 550 Ti. (explain)

Radeon HD 5770 34000 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 5200 (18%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 550 Ti is superior to the Radeon HD 5770, by a large margin. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 8000 (59%)

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 5770

Specifications

Display Specifications

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Model GeForce GTX 550 Ti Radeon HD 5770
Manufacturer nVidia AMD
Year March 2011 October 13, 2009
Code Name GF116 Juniper XT
Memory 1024 MB 1024 MB
Core Speed 900 MHz 850 MHz
Memory Speed 4104 MHz 4800 MHz
Power (Max TDP) 116 watts 108 watts
Bandwidth 98496 MB/sec 76800 MB/sec
Texel Rate 28800 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 1040 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 max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce GTX 550 Ti

Radeon HD 5770

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