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Radeon HD 6670 (OEM) vs Radeon HD 6770
Intro
The Radeon HD 6670 (OEM) features a core clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 480 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.Compare those specifications to the Radeon HD 6770, which makes use of a 40 nm design. ATi has set the core frequency at 900 MHz. The GDDR5 memory works at a speed of 1050 MHz on this card. It features 800 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
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63 Watts |
| Radeon HD 6770 |
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108 Watts |
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Memory Bandwidth
As far as performance goes, the Radeon HD 6770 should in theory be just a bit superior to the Radeon HD 6670 (OEM) overall. (explain)
| Radeon HD 6770 |
|
67200 MB/sec |
| Radeon HD 6670 (OEM) |
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64000 MB/sec |
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Texel Rate
The Radeon HD 6770 should be a lot (more or less 88%) faster with regards to texture filtering than the Radeon HD 6670 (OEM). (explain)| Radeon HD 6770 |
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36000 Mtexels/sec |
| Radeon HD 6670 (OEM) |
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19200 Mtexels/sec |
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Pixel Rate
The Radeon HD 6770 is quite a bit (more or less 125%) faster with regards to FSAA than the Radeon HD 6670 (OEM), and should be able to handle higher screen resolutions better. (explain)| Radeon HD 6770 |
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14400 Mpixels/sec |
| Radeon HD 6670 (OEM) |
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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.
Radeon HD 6670 (OEM)Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6770Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 6670 (OEM) | Radeon HD 6770 |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | February 2011 | January 2011 |
| Code Name | Turks | Juniper XT |
| Fab Process | 40 nm | 40 nm |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| Memory | 512 MB | 512 MB |
| Core Speed | 800 MHz | 900 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1000 MHz | 1050 MHz |
| Unified Shaders | 480 | 800 |
| Texture Mapping Units | 24 | 40 |
| Render Output Units | 8 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.1 |
| Power (Max TDP) | 63 watts | 108 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 64000 MB/sec | 67200 MB/sec |
| Texel Rate | 19200 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 6400 Mpixels/sec | 14400 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of 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 maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
Comments
One Response to “Radeon HD 6670 (OEM) vs Radeon HD 6770”Thanks,this site is a real guide for the beginners!