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GeForce GTX 550 Ti vs Radeon HD 6870

Intro

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

Compare those specifications to the Radeon HD 6870, which features GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 256-bit bus. It also is comprised of 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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(No game benchmarks for this combination yet.)

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

Theoretically speaking, the Radeon HD 6870 should be 36% faster than the GeForce GTX 550 Ti in general, because of its greater data rate. (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 a lot (more or less 75%) faster with regards to anisotropic 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 screen resolution is important to you, then the Radeon HD 6870 is the winner, 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

Display Prices

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GeForce GTX 550 Ti

Amazon.com

Radeon HD 6870

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 6870
Manufacturer nVidia AMD
Year March 2011 October 2010
Code Name GF116 Barts XT
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe x16
Memory 1024 MB 1024 MB
Core Speed 900 MHz 900 MHz
Shader Speed 1800 MHz (N/A) MHz
Memory Speed 4104 MHz 4200 MHz
Unified Shaders 192 1120
Texture Mapping Units 32 56
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 116 watts 151 watts
Shader Model 5.0 5.0
Bandwidth 98496 MB/sec 134400 MB/sec
Texel Rate 28800 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 28800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling 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 in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Comments

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