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GeForce GTX 550 Ti vs Radeon HD 6870

Intro

The GeForce GTX 550 Ti features a GPU clock speed of 900 MHz, and the 1024 MB of GDDR5 memory runs at 1026 MHz through a 192-bit bus. It also is comprised of 192 SPUs, 32 Texture Address Units, and 24 ROPs.

Compare all of that to the Radeon HD 6870, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM runs at a frequency of 1050 MHz on this specific card. It features 1120 SPUs along with 56 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 6870 151 Watts
Difference: 35 Watts (30%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6870 should theoretically be a lot better than the GeForce GTX 550 Ti overall. (explain)

Radeon HD 6870 134400 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 35904 (36%)

Texel Rate

The Radeon HD 6870 should be quite a bit (approximately 75%) better at texture filtering than the GeForce GTX 550 Ti. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 21600 (75%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6870 is superior to the GeForce GTX 550 Ti, and very much so. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GTX 550 Ti 21600 Mpixels/sec
Difference: 7200 (33%)

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 6870

Specifications

Display Specifications

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Model GeForce GTX 550 Ti Radeon HD 6870
Manufacturer nVidia AMD
Year March 2011 October 2010
Code Name GF116 Barts XT
Memory 1024 MB 1024 MB
Core Speed 900 MHz 900 MHz
Memory Speed 4104 MHz 4200 MHz
Power (Max TDP) 116 watts 151 watts
Bandwidth 98496 MB/sec 134400 MB/sec
Texel Rate 28800 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 192 1120
Texture Mapping Units 32 56
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 1700 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units of the card 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 applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

GeForce GTX 550 Ti

Radeon HD 6870

Comments

4 Responses to “GeForce GTX 550 Ti vs Radeon HD 6870”
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