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Radeon HD 6870 vs Radeon HD 7770
Intro
The Radeon HD 6870 comes with a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1120 SPUs, 56 TAUs, and 32 ROPs.Compare those specs to the Radeon HD 7770, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.
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 7770 |
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3180 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 7770 |
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80 Watts |
| Radeon HD 6870 |
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151 Watts |
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Memory Bandwidth
The Radeon HD 6870 should theoretically be quite a bit faster than the Radeon HD 7770 in general. (explain)
| Radeon HD 6870 |
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134400 MB/sec |
| Radeon HD 7770 |
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72000 MB/sec |
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Texel Rate
The Radeon HD 6870 is quite a bit (about 26%) more effective at texture filtering than the Radeon HD 7770. (explain)| Radeon HD 6870 |
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50400 Mtexels/sec |
| Radeon HD 7770 |
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40000 Mtexels/sec |
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Pixel Rate
The Radeon HD 6870 will be a lot (about 80%) better at anti-aliasing than the Radeon HD 7770, and also should be capable of handling higher screen resolutions better. (explain)| Radeon HD 6870 |
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28800 Mpixels/sec |
| Radeon HD 7770 |
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16000 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 7770Amazon.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 6870 | Radeon HD 7770 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | October 2010 | February 2012 |
| Code Name | Barts XT | Cape Verde XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 900 MHz | 1000 MHz |
| Memory Speed | 4200 MHz | 4500 MHz |
| Power (Max TDP) | 151 watts | 80 watts |
| Bandwidth | 134400 MB/sec | 72000 MB/sec |
| Texel Rate | 50400 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 28800 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 1120 | 640 |
| Texture Mapping Units | 56 | 40 |
| Render Output Units | 32 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 1700 million | 1500 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: Bandwidth is the max amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
Radeon HD 6870Amazon.com
Check prices at:
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Radeon HD 7770Amazon.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
3 Responses to “Radeon HD 6870 vs Radeon HD 7770”Are you using pice 2 or pcie 3
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It would have to be PCI-e 2.0 or 2.1 because the 6970 doesn't support PCI-e 3.0, and the theoretical benchmarks are not dependent on PCI-e speed. Anyway, you should get the 6870 instead of the 7770, the 68xx series has the BEST price to performance ratio of ANY AMD/ATI radeon HD graphics card.
[...] HD 6870 will be a lot (approximately 26%) faster with regards to AF than the Radeon HD 7770. (explain)Radeon HD 6870 50400 Mtexels/sec Radeon HD 7770 40000 Mtexels/sec Difference: 10400 (26%) [...]