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Radeon HD 5870 vs Radeon HD 6870
Intro
The Radeon HD 5870 has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 1600(320x5) SPUs as well as 80 TAUs and 32 ROPs.Compare all that to the Radeon HD 6870, which makes use of a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 RAM runs at a frequency of 1050 MHz on this model. It features 1120 SPUs along with 56 TAUs and 32 ROPs.
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
Performance-wise, the Radeon HD 5870 should theoretically be a small bit better than the Radeon HD 6870 in general. (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 much (about 35%) faster with regards to texture filtering 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 just a bit (approximately 6%) more effective at AA than the Radeon HD 5870, and will be able to handle higher screen resolutions more effectively. (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
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Radeon HD 6870Amazon.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 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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock 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 processed in one second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
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