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Radeon HD 5870 vs Radeon HD 6870
Intro
The Radeon HD 5870 has a GPU clock speed of 850 MHz, and the 1024 MB of GDDR5 memory runs at 1200 MHz through a 256-bit bus. It also is comprised of 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.Compare those specs to the Radeon HD 6870, which features core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 1120 SPUs along with 56 TAUs and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6870 |
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151 Watts |
| Radeon HD 5870 |
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188 Watts |
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Memory Bandwidth
In theory, the Radeon HD 5870 should be 14% quicker than the Radeon HD 6870 overall, because of its greater data rate. (explain)
| Radeon HD 5870 |
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153600 MB/sec |
| Radeon HD 6870 |
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134400 MB/sec |
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Texel Rate
The Radeon HD 5870 will be a lot (more or less 35%) better at AF than the Radeon HD 6870. (explain)| Radeon HD 5870 |
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68000 Mtexels/sec |
| Radeon HD 6870 |
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50400 Mtexels/sec |
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Pixel Rate
The Radeon HD 6870 is a small bit (approximately 6%) more effective at AA than the Radeon HD 5870, and will be able to handle higher screen resolutions while still performing well. (explain)| Radeon HD 6870 |
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28800 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
Check prices at:
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Radeon HD 6870Amazon.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 5870 | Radeon HD 6870 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | September 23, 2009 | October 2010 |
| Code Name | Cypress XT | Barts XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 850 MHz | 900 MHz |
| Memory Speed | 4800 MHz | 4200 MHz |
| Power (Max TDP) | 188 watts | 151 watts |
| Bandwidth | 153600 MB/sec | 134400 MB/sec |
| Texel Rate | 68000 Mtexels/sec | 50400 Mtexels/sec |
| Pixel Rate | 27200 Mpixels/sec | 28800 Mpixels/sec |
| Unified Shaders | 1600(320x5) | 1120 |
| Texture Mapping Units | 80 | 56 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 2154 million | 1700 million |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 5870Amazon.com
Check prices at:
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Radeon HD 6870Amazon.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
5 Responses to “Radeon HD 5870 vs Radeon HD 6870”[...] [...]
[...] Here is a theoretical comparison, that has always seemed pretty close to real world performance. Radeon HD 5870 vs Radeon HD 6870 – Performance Comparison Benchmarks @ Hardware Compare If you can wait till this evening, we do have some real experts, and you won't be disappointed. [...]
[...] Posted by Lemon hahahaha that's a 5870 loser Idiot, see this: Radeon HD 5870 vs Radeon HD 6870 ***8211; Performance Comparison Benchmarks @ Hardware Compare 5870 is better than 6870, I think it may be better than all but the 6900 series [...]
[...] more efficient in terms of power consumption compared to a 5870 (unless I've overlooked something) Radeon HD 5870 vs Radeon HD 6870 – Performance Comparison Benchmarks @ Hardware Compare Definitely will be aiming for a used card, hopefully some fellow Canucks will sell their cards to [...]
Real world shows the 6870 will deliver better performance over its sibling at high res': http://www.techspot.com/review/325-amd-radeon-6870/page8.html