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Radeon HD 4850 X2 1GB vs Radeon HD 6870
Intro
The Radeon HD 4850 X2 1GB features clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.Compare those specs to the Radeon HD 6870, which comes with a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It features 1120 SPUs, 56 TAUs, and 32 ROPs.
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
Theoretically, the Radeon HD 6870 should be just a bit faster 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 small bit (more or less 1%) more effective at 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
If running with lots of anti-aliasing is important to you, then the Radeon HD 6870 is a better choice, and very much so. (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
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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: Bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.
Radeon HD 4850 X2 1GBAmazon.com
Check prices at:
|
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 [...]