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Radeon HD 4830 512MB vs Radeon HD 6770 1GB
Intro
The Radeon HD 4830 512MB comes with a clock frequency of 575 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.Compare all of that to the Radeon HD 6770 1GB, which has clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 TAUs and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4830 512MB |
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95 Watts |
| Radeon HD 6770 1GB |
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108 Watts |
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Memory Bandwidth
In theory, the Radeon HD 6770 1GB should perform a small bit faster than the Radeon HD 4830 512MB overall. (explain)
| Radeon HD 6770 1GB |
|
67200 MB/sec |
| Radeon HD 4830 512MB |
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57600 MB/sec |
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Texel Rate
The Radeon HD 6770 1GB is much (more or less 96%) better at AF than the Radeon HD 4830 512MB. (explain)| Radeon HD 6770 1GB |
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36000 Mtexels/sec |
| Radeon HD 4830 512MB |
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18400 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the Radeon HD 6770 1GB is the winner, by far. (explain)| Radeon HD 6770 1GB |
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14400 Mpixels/sec |
| Radeon HD 4830 512MB |
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9200 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 4830 512MBAmazon.com
Check prices at:
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Radeon HD 6770 1GBAmazon.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 4830 512MB | Radeon HD 6770 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Oct 21, 2008 | January 2011 |
| Code Name | RV770 LE | Juniper XT |
| Memory | 512 MB | 1024 MB |
| Core Speed | 575 MHz | 900 MHz |
| Memory Speed | 1800 MHz | 4200 MHz |
| Power (Max TDP) | 95 watts | 108 watts |
| Bandwidth | 57600 MB/sec | 67200 MB/sec |
| Texel Rate | 18400 Mtexels/sec | 36000 Mtexels/sec |
| Pixel Rate | 9200 Mpixels/sec | 14400 Mpixels/sec |
| Unified Shaders | 640(128x5) | 800 |
| Texture Mapping Units | 32 | 40 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 million | 1040 million |
| Bus | PCIe 2.0 x16 | PCIe x16 |
| DirectX Version | DirectX 10.1 | DirectX 11 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.1 |
Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 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 high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
Radeon HD 4830 512MBAmazon.com
Check prices at:
|
Radeon HD 6770 1GBAmazon.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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