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Radeon HD 4830 1GB vs Radeon HD 6770 1GB
Intro
The Radeon HD 4830 1GB comes with a core clock frequency of 575 MHz and a GDDR4 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It features 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.Compare those specs to the Radeon HD 6770 1GB, which features core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs as well as 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
Theoretically speaking, the Radeon HD 6770 1GB should be just a bit faster than the Radeon HD 4830 1GB in general. (explain)
| Radeon HD 6770 1GB |
|
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 will be much (more or less 96%) better at texture filtering 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 should be much (about 57%) more effective at FSAA than the Radeon HD 4830 1GB, and also able to handle higher 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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure 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 video 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 that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 4830 1GBAmazon.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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