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Radeon HD 4850 X2 1GB vs Radeon HD 6870
Intro
The Radeon HD 4850 X2 1GB makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 memory is set to run at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.Compare all that to the Radeon HD 6870, which comes with a clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also features a 256-bit bus, and uses a 40 nm design. It features 1120 SPUs, 56 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6870 |
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151 Watts |
| Radeon HD 4850 X2 1GB |
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250 Watts |
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Memory Bandwidth
As far as performance goes, the Radeon HD 6870 should theoretically be a little bit better than the Radeon HD 4850 X2 1GB in general. (explain)
| Radeon HD 6870 |
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134400 MB/sec |
| Radeon HD 4850 X2 1GB |
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127104 MB/sec |
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Texel Rate
The Radeon HD 6870 should be a bit (approximately 1%) faster with regards to texture filtering than the Radeon HD 4850 X2 1GB. (explain)| Radeon HD 6870 |
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50400 Mtexels/sec |
| Radeon HD 4850 X2 1GB |
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50000 Mtexels/sec |
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Pixel Rate
The Radeon HD 6870 should be quite a bit (more or less 44%) more effective at FSAA than the Radeon HD 4850 X2 1GB, and also will be capable of handling higher resolutions without slowing down too much. (explain)| Radeon HD 6870 |
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28800 Mpixels/sec |
| Radeon HD 4850 X2 1GB |
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20000 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
Radeon HD 4850 X2 1GBAmazon.com
Check prices at:
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Radeon HD 6870Amazon.com
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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
Specifications
| Model | Radeon HD 4850 X2 1GB | Radeon HD 6870 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Nov 7, 2008 | October 2010 |
| Code Name | R700 | Barts XT |
| Memory | 1024 MB (x2) | 1024 MB |
| Core Speed | 625 MHz (x2) | 900 MHz |
| Memory Speed | 1986 MHz (x2) | 4200 MHz |
| Power (Max TDP) | 250 watts | 151 watts |
| Bandwidth | 127104 MB/sec | 134400 MB/sec |
| Texel Rate | 50000 Mtexels/sec | 50400 Mtexels/sec |
| Pixel Rate | 20000 Mpixels/sec | 28800 Mpixels/sec |
| Unified Shaders | 800(160x5) (x2) | 1120 |
| Texture Mapping Units | 40 (x2) | 56 |
| Render Output Units | 16 (x2) | 32 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 256-bit (x2) | 256-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 1700 million |
| Bus | PCIe 2.0 x16 (PCIe bridge) | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core 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 in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the 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 - also sometimes called 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.
Radeon HD 4850 X2 1GBAmazon.com
Check prices at:
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Radeon HD 6870Amazon.com
Check prices at:
|
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
|
Comments
One Response to “Radeon HD 4850 X2 1GB vs Radeon HD 6870”[...] dove potresi reperirla,una 4850x2 va circa e anche meno di una 6870 ( che costa circa 140 €). Radeon HD 4850 X2 1GB vs Radeon HD 6870 – Performance Comparison Benchmarks @ Hardware Compare Phenom II X4 955 BE @ 3.913 Ghz by Thermalright Macho HR-02 -- XFX 6950 1 GB Dual Fan 1000 [...]