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Radeon HD 3850 512MB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 3850 512MB makes use of a 55 nm design. ATi has set the core frequency at 668 MHz. The GDDR3 RAM runs at a frequency of 828 MHz on this particular card. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 ROPs.Compare all of that to the Radeon HD 6670 (OEM), which has a clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 TAUs, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
|
63 Watts |
| Radeon HD 3850 512MB |
|
75 Watts |
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Memory Bandwidth
Performance-wise, the Radeon HD 6670 (OEM) should in theory be quite a bit superior to the Radeon HD 3850 512MB overall. (explain)
| Radeon HD 6670 (OEM) |
|
64000 MB/sec |
| Radeon HD 3850 512MB |
|
52992 MB/sec |
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Texel Rate
The Radeon HD 6670 (OEM) is much (about 80%) faster with regards to AF than the Radeon HD 3850 512MB. (explain)| Radeon HD 6670 (OEM) |
|
19200 Mtexels/sec |
| Radeon HD 3850 512MB |
|
10688 Mtexels/sec |
|
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Pixel Rate
The Radeon HD 3850 512MB is quite a bit (more or less 67%) more effective at full screen anti-aliasing than the Radeon HD 6670 (OEM), and also should be able to handle higher screen resolutions without slowing down too much. (explain)| Radeon HD 3850 512MB |
|
10688 Mpixels/sec |
| Radeon HD 6670 (OEM) |
|
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 512MBAmazon.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
|
Specifications
| Model | Radeon HD 3850 512MB | 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 | 512 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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core 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 processed in a second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.
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