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Radeon HD 6870 vs Radeon HD 7850
Intro
The Radeon HD 6870 has a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1120 SPUs, 56 TAUs, and 32 Raster Operation Units.Compare all of that to the Radeon HD 7850, which makes use of a 28 nm design. AMD has clocked the core frequency at 860 MHz. The GDDR5 RAM runs at a speed of 1200 MHz on this specific card. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.
Benchmarks
These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.
3DMark Fire Strike Graphics Score
| Radeon HD 7850 |
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5200 points |
| Radeon HD 6870 |
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2870 points |
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Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7850 |
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130 Watts |
| Radeon HD 6870 |
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151 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 7850 will be 14% faster than the Radeon HD 6870 overall, due to its greater data rate. (explain)
| Radeon HD 7850 |
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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 7850 is just a bit (approximately 9%) more effective at anisotropic filtering than the Radeon HD 6870. (explain)| Radeon HD 7850 |
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55040 Mtexels/sec |
| Radeon HD 6870 |
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50400 Mtexels/sec |
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Pixel Rate
The Radeon HD 6870 should be a little bit (about 5%) better at AA than the Radeon HD 7850, and able to handle higher screen resolutions better. (explain)| Radeon HD 6870 |
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28800 Mpixels/sec |
| Radeon HD 7850 |
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27520 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 6870Amazon.com
Check prices at:
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Radeon HD 7850Amazon.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 6870 | Radeon HD 7850 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | October 2010 | March 2012 |
| Code Name | Barts XT | Pitcairn Pro |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 900 MHz | 860 MHz |
| Memory Speed | 4200 MHz | 4800 MHz |
| Power (Max TDP) | 151 watts | 130 watts |
| Bandwidth | 134400 MB/sec | 153600 MB/sec |
| Texel Rate | 50400 Mtexels/sec | 55040 Mtexels/sec |
| Pixel Rate | 28800 Mpixels/sec | 27520 Mpixels/sec |
| Unified Shaders | 1120 | 1024 |
| Texture Mapping Units | 56 | 64 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 1700 million | 2800 million |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred over 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 better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units 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 in a second.
Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 6870Amazon.com
Check prices at:
|
Radeon HD 7850Amazon.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.
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Comments
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