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Radeon HD 5770 vs Radeon HD 6770
Intro
The Radeon HD 5770 features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.Compare those specs to the Radeon HD 6770, which features GPU clock speed of 900 MHz, and 512 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
In theory, the Radeon HD 5770 should be 14% quicker than the Radeon HD 6770 overall, because of its greater bandwidth. (explain)
| Radeon HD 5770 |
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76800 MB/sec |
| Radeon HD 6770 |
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67200 MB/sec |
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Texel Rate
The Radeon HD 6770 should be a bit (about 6%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)| Radeon HD 6770 |
|
36000 Mtexels/sec |
| Radeon HD 5770 |
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34000 Mtexels/sec |
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Pixel Rate
If using lots of anti-aliasing is important to you, then the Radeon HD 6770 is the winner, though only just barely. (explain)| Radeon HD 6770 |
|
14400 Mpixels/sec |
| Radeon HD 5770 |
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13600 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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Radeon HD 5770Amazon.com
Other US-based stores
Amazon.co.uk
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Radeon HD 6770Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 5770 | Radeon HD 6770 |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | October 13, 2009 | January 2011 |
| Code Name | Juniper XT | Juniper XT |
| Fab Process | 40 nm | 40 nm |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| Memory | 1024 MB | 512 MB |
| Core Speed | 850 MHz | 900 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1200 MHz | 1050 MHz |
| Unified Shaders | 800(160x5) | 800 |
| Texture Mapping Units | 40 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 128-bit |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.1 |
| Power (Max TDP) | 108 watts | 108 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 76800 MB/sec | 67200 MB/sec |
| Texel Rate | 34000 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 13600 Mpixels/sec | 14400 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, 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 maximum number of 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 number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.
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