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Radeon HD 5770 vs Radeon HD 7850
Intro
The Radeon HD 5770 has a GPU core speed of 850 MHz, and the 1024 MB of GDDR5 RAM runs at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.Compare those specifications to the Radeon HD 7850, which comes with a clock frequency of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.
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
The Radeon HD 7850, in theory, should perform quite a bit faster than the Radeon HD 5770 in general. (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 should be a lot (more or less 62%) better at 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 is a lot (approximately 102%) faster with regards to FSAA than the Radeon HD 5770, and also should be able to handle higher screen resolutions without slowing down too much. (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 5770
Radeon HD 7850
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 maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.
Radeon HD 5770
Radeon HD 7850
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