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Radeon HD 3470 256MB vs Radeon HD 6770
Intro
The Radeon HD 3470 256MB uses a 55 nm design. AMD has set the core frequency at 800 MHz. The DDR2 memory runs at a frequency of 950 MHz on this specific model. It features 40(8x5) SPUs along with 4 TAUs and 4 Rasterization Operator Units.Compare that to the Radeon HD 6770, which comes with GPU core speed of 900 MHz, and 512 MB of GDDR5 RAM running at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
Theoretically speaking, the Radeon HD 6770 will be 121% quicker than the Radeon HD 3470 256MB in general, because of its higher bandwidth. (explain)
| Radeon HD 6770 |
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67200 MB/sec |
| Radeon HD 3470 256MB |
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30400 MB/sec |
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Texel Rate
The Radeon HD 6770 will be quite a bit (about 1025%) more effective at AF than the Radeon HD 3470 256MB. (explain)| Radeon HD 6770 |
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36000 Mtexels/sec |
| Radeon HD 3470 256MB |
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3200 Mtexels/sec |
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Pixel Rate
The Radeon HD 6770 will be much (approximately 350%) faster with regards to FSAA than the Radeon HD 3470 256MB, and also should be able to handle higher resolutions more effectively. (explain)| Radeon HD 6770 |
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14400 Mpixels/sec |
| Radeon HD 3470 256MB |
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3200 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
Radeon HD 3470 256MBAmazon.com
Check prices at:
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Radeon HD 6770Amazon.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 | Radeon HD 3470 256MB | Radeon HD 6770 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | 2008 | January 2011 |
| Code Name | RV620 PRO | Juniper XT |
| Memory | 256 MB | 512 MB |
| Core Speed | 800 MHz | 900 MHz |
| Memory Speed | 1900 MHz | 4200 MHz |
| Power (Max TDP) | (Unknown) watts | 108 watts |
| Bandwidth | 30400 MB/sec | 67200 MB/sec |
| Texel Rate | 3200 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 3200 Mpixels/sec | 14400 Mpixels/sec |
| Unified Shaders | 40(8x5) | 800 |
| Texture Mapping Units | 4 | 40 |
| Render Output Units | 4 | 16 |
| Bus Type | DDR2 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | (Unknown) million | 1040 million |
| Bus | PCIe 2.0 x16 | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 3470 256MBAmazon.com
Check prices at:
|
Radeon HD 6770Amazon.com
Check prices at:
|
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.
|
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