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Radeon HD 6770 1GB vs Radeon HD 7970
Intro
The Radeon HD 6770 1GB features a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 800 SPUs, 40 TAUs, and 16 ROPs.Compare those specs to the Radeon HD 7970, which has GPU clock speed of 925 MHz, and 3072 MB of GDDR5 RAM running at 1375 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6770 1GB |
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108 Watts |
| Radeon HD 7970 |
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250 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 7970 should be quite a bit faster than the Radeon HD 6770 1GB in general. (explain)
| Radeon HD 7970 |
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264000 MB/sec |
| Radeon HD 6770 1GB |
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67200 MB/sec |
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Texel Rate
The Radeon HD 7970 is much (approximately 229%) better at anisotropic filtering than the Radeon HD 6770 1GB. (explain)| Radeon HD 7970 |
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118400 Mtexels/sec |
| Radeon HD 6770 1GB |
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36000 Mtexels/sec |
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Pixel Rate
The Radeon HD 7970 will be a lot (more or less 106%) faster with regards to full screen anti-aliasing than the Radeon HD 6770 1GB, and also capable of handling higher screen resolutions without losing too much performance. (explain)| Radeon HD 7970 |
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29600 Mpixels/sec |
| Radeon HD 6770 1GB |
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14400 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 6770 1GBAmazon.com
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Radeon HD 7970Amazon.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 6770 1GB | Radeon HD 7970 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | January 2011 | January 2012 |
| Code Name | Juniper XT | Tahiti XT |
| Memory | 1024 MB | 3072 MB |
| Core Speed | 900 MHz | 925 MHz |
| Memory Speed | 4200 MHz | 5500 MHz |
| Power (Max TDP) | 108 watts | 250 watts |
| Bandwidth | 67200 MB/sec | 264000 MB/sec |
| Texel Rate | 36000 Mtexels/sec | 118400 Mtexels/sec |
| Pixel Rate | 14400 Mpixels/sec | 29600 Mpixels/sec |
| Unified Shaders | 800 | 2048 |
| Texture Mapping Units | 40 | 128 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 384-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 1040 million | 4313 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 information (counted in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.
Radeon HD 6770 1GBAmazon.com
Check prices at:
|
Radeon HD 7970Amazon.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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