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Geforce GTX 670 vs Radeon HD 6870
Intro
The Geforce GTX 670 features a core clock frequency of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It features 1344 SPUs, 112 TAUs, and 32 ROPs.Compare those specs to the Radeon HD 6870, which uses a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a frequency of 1050 MHz on this specific model. It features 1120 SPUs along with 56 TAUs and 32 Rasterization Operator Units.
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
In theory, the Geforce GTX 670 will be 43% quicker than the Radeon HD 6870 overall, due to its greater bandwidth. (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 is a lot (approximately 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 just a bit (more or less 2%) faster with regards to AA than the Radeon HD 6870, and capable of handling higher screen resolutions without slowing down too much. (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
Geforce GTX 670Amazon.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 670 | Radeon HD 6870 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| 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 11.0 | 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 maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 one second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.
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