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Radeon HD 4830 1GB vs Radeon HD 6770 1GB
Intro
The Radeon HD 4830 1GB has a core clock frequency of 575 MHz and a GDDR4 memory frequency of 900 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.Compare all of that to the Radeon HD 6770 1GB, which features core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 TAUs and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4830 1GB |
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95 Watts |
| Radeon HD 6770 1GB |
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108 Watts |
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Memory Bandwidth
The Radeon HD 6770 1GB should in theory perform a bit faster than the Radeon HD 4830 1GB in general. (explain)
| Radeon HD 6770 1GB |
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67200 MB/sec |
| Radeon HD 4830 1GB |
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57600 MB/sec |
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Texel Rate
The Radeon HD 6770 1GB should be quite a bit (more or less 96%) faster with regards to AF than the Radeon HD 4830 1GB. (explain)| Radeon HD 6770 1GB |
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36000 Mtexels/sec |
| Radeon HD 4830 1GB |
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18400 Mtexels/sec |
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Pixel Rate
The Radeon HD 6770 1GB is a lot (about 57%) more effective at FSAA than the Radeon HD 4830 1GB, and also capable of handling higher screen resolutions better. (explain)| Radeon HD 6770 1GB |
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14400 Mpixels/sec |
| Radeon HD 4830 1GB |
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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 1GBAmazon.com
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Radeon HD 6770 1GBAmazon.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 4830 1GB | Radeon HD 6770 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Oct 21, 2008 | January 2011 |
| Code Name | RV770 LE | Juniper XT |
| Memory | 1024 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 | GDDR4 | 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 (counted in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 4830 1GBAmazon.com
Check prices at:
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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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