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Radeon HD 4850 2GB vs Radeon HD 6450 (OEM)
Intro
The Radeon HD 4850 2GB features a clock frequency of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.Compare those specs to the Radeon HD 6450 (OEM), which features clock speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 160 SPUs as well as 8 Texture Address Units and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) |
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31 Watts |
| Radeon HD 4850 2GB |
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110 Watts |
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Memory Bandwidth
Theoretically, the Radeon HD 4850 2GB should be a lot faster than the Radeon HD 6450 (OEM) in general. (explain)
| Radeon HD 4850 2GB |
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63552 MB/sec |
| Radeon HD 6450 (OEM) |
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12800 MB/sec |
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Texel Rate
The Radeon HD 4850 2GB should be quite a bit (approximately 400%) faster with regards to texture filtering than the Radeon HD 6450 (OEM). (explain)| Radeon HD 4850 2GB |
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25000 Mtexels/sec |
| Radeon HD 6450 (OEM) |
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5000 Mtexels/sec |
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Pixel Rate
If using a high resolution is important to you, then the Radeon HD 4850 2GB is the winner, by far. (explain)| Radeon HD 4850 2GB |
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10000 Mpixels/sec |
| Radeon HD 6450 (OEM) |
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2500 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)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 4850 2GB | Radeon HD 6450 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | February 2011 |
| Code Name | RV770 PRO | Caicos |
| Memory | 2048 MB | 512 MB |
| Core Speed | 625 MHz | 625 MHz |
| Memory Speed | 1986 MHz | 1600 MHz |
| Power (Max TDP) | 110 watts | 31 watts |
| Bandwidth | 63552 MB/sec | 12800 MB/sec |
| Texel Rate | 25000 Mtexels/sec | 5000 Mtexels/sec |
| Pixel Rate | 10000 Mpixels/sec | 2500 Mpixels/sec |
| Unified Shaders | 800(160x5) | 160 |
| Texture Mapping Units | 40 | 8 |
| Render Output Units | 16 | 4 |
| Bus Type | GDDR4 | GDDR3 |
| 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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. 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 AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling 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 the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 4850 2GBAmazon.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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