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Radeon HD 6870 vs Radeon HD 7850
Intro
The Radeon HD 6870 has a GPU core speed of 900 MHz, and the 1024 MB of GDDR5 RAM is set to run at 1050 MHz through a 256-bit bus. It also features 1120 SPUs, 56 TAUs, and 32 Raster Operation Units.Compare those specs to the Radeon HD 7850, which has GPU clock speed of 860 MHz, and 2048 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1024 Stream Processors, 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
The Radeon HD 7850 should in theory be a small bit faster than the Radeon HD 6870 in general. (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 will be a bit (about 9%) more effective at AF 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 small bit (approximately 5%) more effective at AA than the Radeon HD 7850, and capable of handling higher 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 information (in units of megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 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 better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number 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 drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability 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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