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GeForce GTX 550 Ti vs Radeon HD 6870
Intro
The GeForce GTX 550 Ti comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also features a 192-bit bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 TAUs, and 24 ROPs.Compare those specifications to the Radeon HD 6870, which features a clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It is comprised of 1120 SPUs, 56 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GTX 550 Ti |
|
116 Watts |
| Radeon HD 6870 |
|
151 Watts |
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Memory Bandwidth
The Radeon HD 6870 should theoretically be much faster than the GeForce GTX 550 Ti in general. (explain)
| Radeon HD 6870 |
|
134400 MB/sec |
| GeForce GTX 550 Ti |
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98496 MB/sec |
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Texel Rate
The Radeon HD 6870 should be quite a bit (about 75%) better at anisotropic filtering than the GeForce GTX 550 Ti. (explain)| Radeon HD 6870 |
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50400 Mtexels/sec |
| GeForce GTX 550 Ti |
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28800 Mtexels/sec |
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Pixel Rate
The Radeon HD 6870 should be a lot (more or less 33%) faster with regards to FSAA than the GeForce GTX 550 Ti, and also should be able to handle higher screen resolutions without losing too much performance. (explain)| Radeon HD 6870 |
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28800 Mpixels/sec |
| GeForce GTX 550 Ti |
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21600 Mpixels/sec |
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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 TiAmazon.com
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Radeon HD 6870Amazon.com
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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
| 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 | 1026 MHz (4104 MHz effective) | 1050 MHz (4200 MHz effective) |
| 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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus 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 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
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