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Radeon HD 4850 2GB vs Radeon HD 6450 (OEM) 1GB
Intro
The Radeon HD 4850 2GB makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR4 RAM works at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which has a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory running at 900 MHz through a 64-bit bus. It also is made up of 160 Stream Processors, 8 Texture Address Units, and 4 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) 1GB |
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31 Watts |
| Radeon HD 4850 2GB |
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110 Watts |
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Memory Bandwidth
As far as performance goes, the Radeon HD 4850 2GB should in theory be much better than the Radeon HD 6450 (OEM) 1GB in general. (explain)
| Radeon HD 4850 2GB |
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63552 MB/sec |
| Radeon HD 6450 (OEM) 1GB |
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28800 MB/sec |
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Texel Rate
The Radeon HD 4850 2GB should be quite a bit (more or less 317%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)| Radeon HD 4850 2GB |
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25000 Mtexels/sec |
| Radeon HD 6450 (OEM) 1GB |
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6000 Mtexels/sec |
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Pixel Rate
The Radeon HD 4850 2GB should be a lot (about 233%) more effective at AA than the Radeon HD 6450 (OEM) 1GB, and also able to handle higher screen resolutions more effectively. (explain)| Radeon HD 4850 2GB |
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10000 Mpixels/sec |
| Radeon HD 6450 (OEM) 1GB |
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3000 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 4850 2GBAmazon.com
Check prices at:
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Radeon HD 6450 (OEM) 1GBAmazon.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 4850 2GB | Radeon HD 6450 (OEM) 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | February 2011 |
| Code Name | RV770 PRO | Caicos |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 625 MHz | 750 MHz |
| Memory Speed | 1986 MHz | 3600 MHz |
| Power (Max TDP) | 110 watts | 31 watts |
| Bandwidth | 63552 MB/sec | 28800 MB/sec |
| Texel Rate | 25000 Mtexels/sec | 6000 Mtexels/sec |
| Pixel Rate | 10000 Mpixels/sec | 3000 Mpixels/sec |
| Unified Shaders | 800(160x5) | 160 |
| Texture Mapping Units | 40 | 8 |
| Render Output Units | 16 | 4 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit | 64-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 956 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 largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.
Radeon HD 4850 2GBAmazon.com
Check prices at:
|
Radeon HD 6450 (OEM) 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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