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Radeon HD 5770 vs Radeon HD 7850
Intro
The Radeon HD 5770 features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.Compare all that to the Radeon HD 7850, which has core clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5770 |
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108 Watts |
| Radeon HD 7850 |
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130 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 7850 will be 100% quicker than the Radeon HD 5770 in general, because of its higher bandwidth. (explain)
| Radeon HD 7850 |
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153600 MB/sec |
| Radeon HD 5770 |
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76800 MB/sec |
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Texel Rate
The Radeon HD 7850 is a lot (more or less 62%) faster with regards to texture filtering than the Radeon HD 5770. (explain)| Radeon HD 7850 |
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55040 Mtexels/sec |
| Radeon HD 5770 |
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34000 Mtexels/sec |
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Pixel Rate
The Radeon HD 7850 should be much (approximately 102%) more effective at AA than the Radeon HD 5770, and also able to handle higher resolutions without losing too much performance. (explain)| Radeon HD 7850 |
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27520 Mpixels/sec |
| Radeon HD 5770 |
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13600 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
Radeon HD 5770Amazon.com
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Radeon HD 7850Amazon.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 5770 | Radeon HD 7850 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | October 13, 2009 | March 2012 |
| Code Name | Juniper XT | Pitcairn Pro |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 850 MHz | 860 MHz |
| Memory Speed | 4800 MHz | 4800 MHz |
| Power (Max TDP) | 108 watts | 130 watts |
| Bandwidth | 76800 MB/sec | 153600 MB/sec |
| Texel Rate | 34000 Mtexels/sec | 55040 Mtexels/sec |
| Pixel Rate | 13600 Mpixels/sec | 27520 Mpixels/sec |
| Unified Shaders | 800(160x5) | 1024 |
| Texture Mapping Units | 40 | 64 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 1040 million | 2800 million |
| Bus | PCIe 2.1 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.2 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 per second. This is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at handling 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 could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 5770Amazon.com
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Radeon HD 7850Amazon.com
|
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.
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