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Geforce GTX 670 vs Radeon HD 6870
Intro
The Geforce GTX 670 features a GPU core speed of 915 MHz, and the 2048 MB of GDDR5 memory is set to run at 1500 MHz through a 256-bit bus. It also features 1344 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.Compare those specs to the Radeon HD 6870, which features a core clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6870 |
|
151 Watts |
| Geforce GTX 670 |
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170 Watts |
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Memory Bandwidth
In theory, the Geforce GTX 670 is 43% quicker than the Radeon HD 6870 in general, due to its higher data rate. (explain)
| Geforce GTX 670 |
|
192000 MB/sec |
| Radeon HD 6870 |
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134400 MB/sec |
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Texel Rate
The Geforce GTX 670 will be quite a bit (approximately 103%) more effective at texture filtering than the Radeon HD 6870. (explain)| Geforce GTX 670 |
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102480 Mtexels/sec |
| Radeon HD 6870 |
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50400 Mtexels/sec |
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Pixel Rate
The Geforce GTX 670 is just a bit (approximately 2%) more effective at FSAA than the Radeon HD 6870, and also will be able to handle higher screen resolutions while still performing well. (explain)| Geforce GTX 670 |
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29280 Mpixels/sec |
| Radeon HD 6870 |
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28800 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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Geforce GTX 670Amazon.com
Other US-based stores
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Radeon HD 6870Amazon.com
Other US-based stores
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Specifications
| Model | Geforce GTX 670 | Radeon HD 6870 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | May 2012 | October 2010 |
| Code Name | GK104 | Barts XT |
| Fab Process | 28 nm | 40 nm |
| Bus | PCIe 3.0 x16 | PCIe x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 915 MHz | 900 MHz |
| Shader Speed | 915 MHz | (N/A) MHz |
| Memory Speed | 1500 MHz (6000 MHz effective) | 1050 MHz (4200 MHz effective) |
| Unified Shaders | 1344 | 1120 |
| Texture Mapping Units | 112 | 56 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| DirectX Version | DirectX 11.1 | DirectX 11 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.1 |
| Power (Max TDP) | 170 watts | 151 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 192000 MB/sec | 134400 MB/sec |
| Texel Rate | 102480 Mtexels/sec | 50400 Mtexels/sec |
| Pixel Rate | 29280 Mpixels/sec | 28800 Mpixels/sec |
Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.
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