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Radeon HD 6670 (OEM) vs Radeon HD 6770 1GB
Intro
The Radeon HD 6670 (OEM) comes with a core clock speed of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is made up of 480 SPUs, 24 TAUs, and 8 ROPs.Compare all of that to the Radeon HD 6770 1GB, which features GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
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63 Watts |
| Radeon HD 6770 1GB |
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108 Watts |
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Memory Bandwidth
In theory, the Radeon HD 6770 1GB will be 5% quicker than the Radeon HD 6670 (OEM) overall, because of its higher bandwidth. (explain)
| Radeon HD 6770 1GB |
|
67200 MB/sec |
| Radeon HD 6670 (OEM) |
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64000 MB/sec |
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Texel Rate
The Radeon HD 6770 1GB should be quite a bit (approximately 88%) better at AF than the Radeon HD 6670 (OEM). (explain)| Radeon HD 6770 1GB |
|
36000 Mtexels/sec |
| Radeon HD 6670 (OEM) |
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19200 Mtexels/sec |
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Pixel Rate
The Radeon HD 6770 1GB is a lot (about 125%) more effective at full screen anti-aliasing than the Radeon HD 6670 (OEM), and also capable of handling higher resolutions more effectively. (explain)| Radeon HD 6770 1GB |
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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 6770 1GBAmazon.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 1GB |
|---|---|---|
| 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 | 1024 MB |
| Core Speed | 800 MHz | 900 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1000 MHz (4000 MHz effective) | 1050 MHz (4200 MHz effective) |
| 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 data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses 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 amount of texture map elements (texels) that can be processed in one second. This number is worked out 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 in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many 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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