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Radeon HD 3870 X2 1GB vs Radeon HD 6570 (OEM) 2GB
Intro
The Radeon HD 3870 X2 1GB features a clock speed of 825 MHz and a GDDR4 memory speed of 1126 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.Compare all of that to the Radeon HD 6570 (OEM) 2GB, which uses a 40 nm design. ATi has set the core frequency at 650 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular model. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
As far as performance goes, the Radeon HD 3870 X2 1GB should theoretically be a lot superior to the Radeon HD 6570 (OEM) 2GB in general. (explain)
| Radeon HD 3870 X2 1GB |
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144128 MB/sec |
| Radeon HD 6570 (OEM) 2GB |
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64000 MB/sec |
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Texel Rate
The Radeon HD 3870 X2 1GB should be a lot (about 69%) more effective at texture filtering than the Radeon HD 6570 (OEM) 2GB. (explain)| Radeon HD 3870 X2 1GB |
|
26400 Mtexels/sec |
| Radeon HD 6570 (OEM) 2GB |
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15600 Mtexels/sec |
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Pixel Rate
The Radeon HD 3870 X2 1GB is quite a bit (about 408%) faster with regards to anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and also capable of handling higher screen resolutions while still performing well. (explain)| Radeon HD 3870 X2 1GB |
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26400 Mpixels/sec |
| Radeon HD 6570 (OEM) 2GB |
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5200 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.
One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.
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 X2 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6570 (OEM) 2GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 3870 X2 1GB | Radeon HD 6570 (OEM) 2GB |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | Jan 28, 2008 | February 2011 |
| Code Name | R680 | Turks |
| Fab Process | 55 nm | 40 nm |
| Bus | PCIe 2.0 x16/(internal PCIe 1.1 x16) | PCIe 2.1 x16 |
| Memory | 1024 MB (x2) | 1024 MB |
| Core Speed | 825 MHz (x2) | 650 MHz |
| Shader Speed | N/A MHz (x2) | (N/A) MHz |
| Memory Speed | 1126 MHz (x2) | 1000 MHz |
| Unified Shaders | 320(64x5) (x2) | 480 |
| Texture Mapping Units | 16 (x2) | 24 |
| Render Output Units | 16 (x2) | 8 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit (x2) | 128-bit |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
| Power (Max TDP) | N/A watts | 50 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 144128 MB/sec | 64000 MB/sec |
| Texel Rate | 26400 Mtexels/sec | 15600 Mtexels/sec |
| Pixel Rate | 26400 Mpixels/sec | 5200 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
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