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Radeon HD 5870 vs Radeon HD 7970
Intro
The Radeon HD 5870 comes with a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It features 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.Compare all that to the Radeon HD 7970, which has GPU clock speed of 925 MHz, and 3072 MB of GDDR5 memory set to run at 1375 MHz through a 384-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.
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
As far as performance goes, the Radeon HD 7970 should theoretically be much superior to the Radeon HD 5870 in general. (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 should be much (more or less 74%) faster with regards to AF 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
If using high levels of AA is important to you, then the Radeon HD 7970 is superior to the Radeon HD 5870, but only just. (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 maximum amount of information (in units of MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core clock 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 per second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max 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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