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Radeon HD 3850 1GB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 3850 1GB uses a 55 nm design. ATi has set the core speed at 668 MHz. The GDDR3 RAM works at a speed of 828 MHz on this particular card. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.Compare those specifications to the Radeon HD 6670 (OEM), which comes with GPU clock speed of 800 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 480 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
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63 Watts |
| Radeon HD 3850 1GB |
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75 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 6670 (OEM) is 21% faster than the Radeon HD 3850 1GB overall, because of its greater data rate. (explain)
| Radeon HD 6670 (OEM) |
|
64000 MB/sec |
| Radeon HD 3850 1GB |
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52992 MB/sec |
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Texel Rate
The Radeon HD 6670 (OEM) will be a lot (approximately 80%) better at texture filtering than the Radeon HD 3850 1GB. (explain)| Radeon HD 6670 (OEM) |
|
19200 Mtexels/sec |
| Radeon HD 3850 1GB |
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10688 Mtexels/sec |
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Pixel Rate
The Radeon HD 3850 1GB will be a lot (about 67%) better at full screen anti-aliasing than the Radeon HD 6670 (OEM), and will be capable of handling higher screen resolutions while still performing well. (explain)| Radeon HD 3850 1GB |
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10688 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 3850 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6670 (OEM)Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 3850 1GB | Radeon HD 6670 (OEM) |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | Nov 19, 2007 | February 2011 |
| Code Name | RV670 PRO | Turks |
| Fab Process | 55 nm | 40 nm |
| Bus | PCIe 2.0 x16/AGP 8x | PCIe 2.1 x16 |
| Memory | 1024 MB | 512 MB |
| Core Speed | 668 MHz | 800 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 828 MHz | 1000 MHz |
| Unified Shaders | 320(64x5) | 480 |
| Texture Mapping Units | 16 | 24 |
| Render Output Units | 16 | 8 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
| Power (Max TDP) | 75 watts | 63 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 52992 MB/sec | 64000 MB/sec |
| Texel Rate | 10688 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 10688 Mpixels/sec | 6400 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip 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 the core 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.
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