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Radeon HD 5870 vs Radeon HD 7970
Intro
The Radeon HD 5870 has a core clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It features 1600(320x5) SPUs, 80 TAUs, and 32 ROPs.Compare all of that to the Radeon HD 7970, which comes with GPU clock speed of 925 MHz, and 3072 MB of GDDR5 RAM set to run at 1375 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5870 |
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188 Watts |
| Radeon HD 7970 |
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250 Watts |
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Memory Bandwidth
In theory, the Radeon HD 7970 will be 72% faster than the Radeon HD 5870 overall, due to its greater bandwidth. (explain)
| Radeon HD 7970 |
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264000 MB/sec |
| Radeon HD 5870 |
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153600 MB/sec |
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Texel Rate
The Radeon HD 7970 will be quite a bit (more or less 74%) faster with regards to texture filtering than the Radeon HD 5870. (explain)| Radeon HD 7970 |
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118400 Mtexels/sec |
| Radeon HD 5870 |
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68000 Mtexels/sec |
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Pixel Rate
The Radeon HD 7970 will be a little bit (more or less 9%) faster with regards to AA than the Radeon HD 5870, and also will be able to handle higher screen resolutions while still performing well. (explain)| Radeon HD 7970 |
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29600 Mpixels/sec |
| Radeon HD 5870 |
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27200 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 5870Amazon.com
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Radeon HD 7970Amazon.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 5870 | Radeon HD 7970 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | September 23, 2009 | January 2012 |
| Code Name | Cypress XT | Tahiti XT |
| Memory | 1024 MB | 3072 MB |
| Core Speed | 850 MHz | 925 MHz |
| Memory Speed | 4800 MHz | 5500 MHz |
| Power (Max TDP) | 188 watts | 250 watts |
| Bandwidth | 153600 MB/sec | 264000 MB/sec |
| Texel Rate | 68000 Mtexels/sec | 118400 Mtexels/sec |
| Pixel Rate | 27200 Mpixels/sec | 29600 Mpixels/sec |
| Unified Shaders | 1600(320x5) | 2048 |
| Texture Mapping Units | 80 | 128 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 384-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 2154 million | 4313 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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better 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 amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.
Radeon HD 5870Amazon.com
Check prices at:
|
Radeon HD 7970Amazon.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
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