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GeForce GTX 660 vs Radeon HD 6670 (OEM) 1GB
Intro
The GeForce GTX 660 has a GPU core clock speed of 980 MHz, and the 2048 MB of GDDR5 memory runs at 1502 MHz through a 192-bit bus. It also is made up of 960 SPUs, 80 Texture Address Units, and 24 ROPs.Compare all of that to the Radeon HD 6670 (OEM) 1GB, which has a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 480 Stream Processors, 24 TAUs, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) 1GB |
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63 Watts |
| GeForce GTX 660 |
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140 Watts |
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Memory Bandwidth
The GeForce GTX 660 should theoretically perform a lot faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)
| GeForce GTX 660 |
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144192 MB/sec |
| Radeon HD 6670 (OEM) 1GB |
|
64000 MB/sec |
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Texel Rate
The GeForce GTX 660 will be a lot (approximately 308%) better at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)| GeForce GTX 660 |
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78400 Mtexels/sec |
| Radeon HD 6670 (OEM) 1GB |
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19200 Mtexels/sec |
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Pixel Rate
If using lots of anti-aliasing is important to you, then the GeForce GTX 660 is a better choice, by a large margin. (explain)| GeForce GTX 660 |
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23520 Mpixels/sec |
| Radeon HD 6670 (OEM) 1GB |
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6400 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 660Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6670 (OEM) 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTX 660 | Radeon HD 6670 (OEM) 1GB |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | September 2012 | February 2011 |
| Code Name | GK106 | Turks |
| Fab Process | 28 nm | 40 nm |
| Bus | PCIe 3.0 x16 | PCIe 2.1 x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 980 MHz | 800 MHz |
| Shader Speed | 980 MHz | (N/A) MHz |
| Memory Speed | 1502 MHz (6008 MHz effective) | 1000 MHz (4000 MHz effective) |
| Unified Shaders | 960 | 480 |
| Texture Mapping Units | 80 | 24 |
| Render Output Units | 24 | 8 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 128-bit |
| DirectX Version | DirectX 11.1 | DirectX 11 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.1 |
| Power (Max TDP) | 140 watts | 63 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 144192 MB/sec | 64000 MB/sec |
| Texel Rate | 78400 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 23520 Mpixels/sec | 6400 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics 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 number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.
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