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Radeon HD 4550 256MB vs Radeon HD 4550 512MB
Intro
The Radeon HD 4550 256MB uses a 55 nm design. AMD has set the core speed at 600 MHz. The DDR3 memory works at a frequency of 800 MHz on this particular card. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.Compare those specifications to the Radeon HD 4550 512MB, which has a GPU core clock speed of 600 MHz, and 512 MB of GDDR3 memory running at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have the exact same memory bandwidth, so theoretically they should perform exactly the same. (explain)
Texel Rate
Both cards have the exact same texel fill rate, so in theory they should be equally good at at AF. (explain)Pixel Rate
Both cards have exactly the same pixel fill rate, so in theory they should be equally good at at FSAA, and be able to handle the same resolutions. (explain)
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 4550 256MBAmazon.com
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Radeon HD 4550 512MBAmazon.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 4550 256MB | Radeon HD 4550 512MB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Sep 30, 2008 | Sep 30, 2008 |
| Code Name | RV710 | RV710 |
| Memory | 256 MB | 512 MB |
| Core Speed | 600 MHz | 600 MHz |
| Memory Speed | 1600 MHz | 1600 MHz |
| Power (Max TDP) | 25 watts | 25 watts |
| Bandwidth | 12800 MB/sec | 12800 MB/sec |
| Texel Rate | 4800 Mtexels/sec | 4800 Mtexels/sec |
| Pixel Rate | 2400 Mpixels/sec | 2400 Mpixels/sec |
| Unified Shaders | 80(16x5) | 80(16x5) |
| Texture Mapping Units | 8 | 8 |
| Render Output Units | 4 | 4 |
| Bus Type | DDR3 | GDDR3 |
| Bus Width | 64-bit | 64-bit |
| Fab Process | 55 nm | 55 nm |
| Transistors | 242 million | 242 million |
| Bus | PCIe 2.0 x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 memory bandwidth is, the lower the ability to reach the max fill rate.
Radeon HD 4550 256MBAmazon.com
Check prices at:
|
Radeon HD 4550 512MBAmazon.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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