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Radeon HD 5870 vs Radeon HD 7970
Intro
The Radeon HD 5870 features a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is comprised of 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.Compare those specs to the Radeon HD 7970, which features core speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 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
Performance-wise, the Radeon HD 7970 should in theory be quite a bit better than the Radeon HD 5870 overall. (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 is much (more or less 74%) more effective at 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
The Radeon HD 7970 should be just a bit (approximately 9%) more effective at anti-aliasing than the Radeon HD 5870, and also able to handle higher 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 data (in units of MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 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 AA, High Dynamic Range and high 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 texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential 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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