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Radeon HD 5770 vs Radeon HD 5870
Intro
The Radeon HD 5770 features a core clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.Compare all of that to the Radeon HD 5870, which has GPU core speed of 850 MHz, and 1024 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also features 1600(320x5) SPUs, 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
Performance-wise, the Radeon HD 5870 should theoretically be much superior to the Radeon HD 5770 overall. (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 (about 100%) faster with regards to AF 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
The Radeon HD 5870 should be quite a bit (about 100%) better at full screen anti-aliasing than the Radeon HD 5770, and capable of handling higher screen resolutions without losing too much performance. (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 maximum amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum 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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