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Radeon HD 4550 256MB vs Radeon HD 4550 512MB
Intro
The Radeon HD 4550 256MB has a GPU clock speed of 600 MHz, and the 256 MB of DDR3 RAM runs at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.Compare those specs to the Radeon HD 4550 512MB, which comes with a GPU core clock speed of 600 MHz, and 512 MB of GDDR3 memory set to run at 800 MHz through a 64-bit bus. It also features 80(16x5) Stream Processors, 8 TAUs, and 4 ROPs.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have exactly the same memory bandwidth, so theoretically they should have identical performance. (explain)
Texel Rate
Both cards have the exact same texel fill rate, so in theory they should perform equally good at at anisotropic filtering. (explain)Pixel Rate
Both cards have exactly the same pixel fill rate, so theoretically they should be equally good at at anti-aliasing, and be able to handle the same screen 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 (in units of megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to 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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