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GeForce GTX 550 Ti vs Radeon HD 7770

Intro

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

Compare that to the Radeon HD 7770, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this specific model. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 36 Watts (45%)

Memory Bandwidth

The GeForce GTX 550 Ti, in theory, should perform a lot faster than the Radeon HD 7770 in general. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 26496 (37%)

Texel Rate

The Radeon HD 7770 is much (approximately 39%) more effective at anisotropic filtering than the GeForce GTX 550 Ti. (explain)

Radeon HD 7770 40000 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 11200 (39%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 550 Ti is the winner, by a large margin. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 5600 (35%)

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 7770

Specifications

Display Specifications

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Model GeForce GTX 550 Ti Radeon HD 7770
Manufacturer nVidia AMD
Year March 2011 February 2012
Code Name GF116 Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 900 MHz 1000 MHz
Memory Speed 4104 MHz 4500 MHz
Power (Max TDP) 116 watts 80 watts
Bandwidth 98496 MB/sec 72000 MB/sec
Texel Rate 28800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 192 640
Texture Mapping Units 32 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1170 million 1500 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high 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 by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

GeForce GTX 550 Ti

Radeon HD 7770

Comments

8 Responses to “GeForce GTX 550 Ti vs Radeon HD 7770”
jony says:

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Loren says:

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mrhiab says:

Hey Joni...you might be AN IT Professional. However your desecration of the English language is astonishing.

what are the factors must consider 1st before buying a VC? - Page 3 says:

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Which modern GPU to completely max out games on an old monitor (1280*1024x60Hz)? - Page 2 says:

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Anonymous says:

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Huge custom computer building thread - Page 3 - XboxMB - Xbox Message Boards says:

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Anonymous says:

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