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Radeon HD 3870 1GB vs Radeon HD 6670 (OEM)
Intro
The Radeon HD 3870 1GB has a GPU core clock speed of 775 MHz, and the 1024 MB of GDDR4 RAM runs at 1125 MHz through a 256-bit bus. It also is comprised of 320(64x5) Stream Processors, 16 TAUs, and 16 ROPs.Compare all that to the Radeon HD 6670 (OEM), which features core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 480 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) |
|
63 Watts |
| Radeon HD 3870 1GB |
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106 Watts |
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Memory Bandwidth
The Radeon HD 3870 1GB, in theory, should perform a little bit faster than the Radeon HD 6670 (OEM) overall. (explain)
| Radeon HD 3870 1GB |
|
72000 MB/sec |
| Radeon HD 6670 (OEM) |
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64000 MB/sec |
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Texel Rate
The Radeon HD 6670 (OEM) is a lot (approximately 55%) faster with regards to anisotropic filtering than the Radeon HD 3870 1GB. (explain)| Radeon HD 6670 (OEM) |
|
19200 Mtexels/sec |
| Radeon HD 3870 1GB |
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12400 Mtexels/sec |
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Pixel Rate
The Radeon HD 3870 1GB will be much (about 94%) faster with regards to AA than the Radeon HD 6670 (OEM), and also able to handle higher resolutions more effectively. (explain)| Radeon HD 3870 1GB |
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12400 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 3870 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 3870 1GB | Radeon HD 6670 (OEM) |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | Nov 19, 2007 | February 2011 |
| Code Name | RV670 XT | 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 | 775 MHz | 800 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1125 MHz | 1000 MHz |
| Unified Shaders | 320(64x5) | 480 |
| Texture Mapping Units | 16 | 24 |
| Render Output Units | 16 | 8 |
| Bus Type | GDDR4 | 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) | 106 watts | 63 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 72000 MB/sec | 64000 MB/sec |
| Texel Rate | 12400 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 12400 Mpixels/sec | 6400 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 are processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
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