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Geforce GTX 670 vs Radeon HD 6870
Intro
The Geforce GTX 670 features a GPU clock speed of 915 MHz, and the 2048 MB of GDDR5 RAM runs at 1500 MHz through a 256-bit bus. It also is made up of 1344 Stream Processors, 112 TAUs, and 32 ROPs.Compare all of that to the Radeon HD 6870, which has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is comprised of 1120 SPUs, 56 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6870 |
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151 Watts |
| Geforce GTX 670 |
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170 Watts |
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Memory Bandwidth
Theoretically, the Geforce GTX 670 should perform much faster than the Radeon HD 6870 in general. (explain)
| Geforce GTX 670 |
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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 much (more or less 103%) better 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 will be a small bit (more or less 2%) better at full screen anti-aliasing than the Radeon HD 6870, and also should be capable of handling higher screen resolutions without losing too much performance. (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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. 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 memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
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