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Radeon HD 4850 X2 1GB vs Radeon HD 6670 (OEM) 1GB
Intro
The Radeon HD 4850 X2 1GB has clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR3 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.Compare those specs to the Radeon HD 6670 (OEM) 1GB, which makes use of a 40 nm design. ATi has clocked the core frequency at 800 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this model. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6670 (OEM) 1GB |
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63 Watts |
| Radeon HD 4850 X2 1GB |
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250 Watts |
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Memory Bandwidth
The Radeon HD 4850 X2 1GB should in theory perform much faster than the Radeon HD 6670 (OEM) 1GB in general. (explain)
| Radeon HD 4850 X2 1GB |
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127104 MB/sec |
| Radeon HD 6670 (OEM) 1GB |
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64000 MB/sec |
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Texel Rate
The Radeon HD 4850 X2 1GB will be much (about 160%) more effective at texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)| Radeon HD 4850 X2 1GB |
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50000 Mtexels/sec |
| Radeon HD 6670 (OEM) 1GB |
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19200 Mtexels/sec |
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Pixel Rate
The Radeon HD 4850 X2 1GB will be a lot (approximately 213%) faster with regards to AA than the Radeon HD 6670 (OEM) 1GB, and should be capable of handling higher resolutions without losing too much performance. (explain)| Radeon HD 4850 X2 1GB |
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20000 Mpixels/sec |
| Radeon HD 6670 (OEM) 1GB |
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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.
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 4850 X2 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6670 (OEM) 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 4850 X2 1GB | Radeon HD 6670 (OEM) 1GB |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | Nov 7, 2008 | February 2011 |
| Code Name | R700 | Turks |
| Fab Process | 55 nm | 40 nm |
| Bus | PCIe 2.0 x16 (PCIe bridge) | PCIe 2.1 x16 |
| Memory | 1024 MB (x2) | 1024 MB |
| Core Speed | 625 MHz (x2) | 800 MHz |
| Shader Speed | N/A MHz (x2) | (N/A) MHz |
| Memory Speed | 993 MHz (x2) | 1000 MHz |
| Unified Shaders | 800(160x5) (x2) | 480 |
| Texture Mapping Units | 40 (x2) | 24 |
| Render Output Units | 16 (x2) | 8 |
| Bus Type | GDDR3 | 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) | 250 watts | 63 watts |
| Shader Model | 4.1 | 5.0 |
| Bandwidth | 127104 MB/sec | 64000 MB/sec |
| Texel Rate | 50000 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 20000 Mpixels/sec | 6400 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
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