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Radeon HD 4550 256MB vs Radeon HD 6450 (OEM)
Intro
The Radeon HD 4550 256MB comes with a core clock speed of 600 MHz and a DDR3 memory frequency of 800 MHz. It also makes use of a 64-bit bus, and makes use of a 55 nm design. It is comprised of 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.Compare all of that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core speed at 625 MHz. The GDDR3 memory is set to run at a speed of 800 MHz on this specific card. It features 160 SPUs along with 8 TAUs and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4550 256MB |
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25 Watts |
| Radeon HD 6450 (OEM) |
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31 Watts |
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Memory Bandwidth
Both cards have the exact same bandwidth, so in theory they should have the same performance. (explain)
Texel Rate
The Radeon HD 6450 (OEM) will be just a bit (more or less 4%) more effective at anisotropic filtering than the Radeon HD 4550 256MB. (explain)| Radeon HD 6450 (OEM) |
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5000 Mtexels/sec |
| Radeon HD 4550 256MB |
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4800 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 6450 (OEM) is the winner, but not by far. (explain)| Radeon HD 6450 (OEM) |
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2500 Mpixels/sec |
| Radeon HD 4550 256MB |
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2400 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 4550 256MBAmazon.com
Check prices at:
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Radeon HD 6450 (OEM)Amazon.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 4550 256MB | Radeon HD 6450 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Sep 30, 2008 | February 2011 |
| Code Name | RV710 | Caicos |
| Memory | 256 MB | 512 MB |
| Core Speed | 600 MHz | 625 MHz |
| Memory Speed | 1600 MHz | 1600 MHz |
| Power (Max TDP) | 25 watts | 31 watts |
| Bandwidth | 12800 MB/sec | 12800 MB/sec |
| Texel Rate | 4800 Mtexels/sec | 5000 Mtexels/sec |
| Pixel Rate | 2400 Mpixels/sec | 2500 Mpixels/sec |
| Unified Shaders | 80(16x5) | 160 |
| Texture Mapping Units | 8 | 8 |
| Render Output Units | 4 | 4 |
| Bus Type | DDR3 | GDDR3 |
| Bus Width | 64-bit | 64-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 242 million | 370 million |
| Bus | PCIe 2.0 x16 | PCIe 2.1 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 megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 rate also depends on quite a few other factors, especially 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 6450 (OEM)Amazon.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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