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Radeon HD 5770 vs Radeon HD 5870
Intro
The Radeon HD 5770 uses a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this specific card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.Compare all of that to the Radeon HD 5870, which features GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1600(320x5) Stream Processors, 80 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5770 |
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108 Watts |
| Radeon HD 5870 |
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188 Watts |
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Memory Bandwidth
As far as performance goes, the Radeon HD 5870 should in theory be much better than the Radeon HD 5770 in general. (explain)
| Radeon HD 5870 |
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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 5870 is a lot (approximately 100%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)| Radeon HD 5870 |
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68000 Mtexels/sec |
| Radeon HD 5770 |
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34000 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 5870 is superior to the Radeon HD 5770, by a large margin. (explain)| Radeon HD 5870 |
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27200 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
Check prices at:
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Radeon HD 5870Amazon.com
Check prices at:
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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 5870 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | October 13, 2009 | September 23, 2009 |
| Code Name | Juniper XT | Cypress XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 850 MHz | 850 MHz |
| Memory Speed | 4800 MHz | 4800 MHz |
| Power (Max TDP) | 108 watts | 188 watts |
| Bandwidth | 76800 MB/sec | 153600 MB/sec |
| Texel Rate | 34000 Mtexels/sec | 68000 Mtexels/sec |
| Pixel Rate | 13600 Mpixels/sec | 27200 Mpixels/sec |
| Unified Shaders | 800(160x5) | 1600(320x5) |
| Texture Mapping Units | 40 | 80 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 1040 million | 2154 million |
| Bus | PCIe 2.1 x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 3.2 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 5770Amazon.com
Check prices at:
|
Radeon HD 5870Amazon.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.
|
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