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Radeon HD 4650 512MB vs Radeon HD 6450 (OEM)
Intro
The Radeon HD 4650 512MB makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The DDR2 RAM works at a frequency of 500 MHz on this specific model. It features 320(64x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.Compare that to the Radeon HD 6450 (OEM), which features a core clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 64-bit bus, and makes use of a 40 nm design. It is comprised of 160 SPUs, 8 TAUs, and 4 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) |
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31 Watts |
| Radeon HD 4650 512MB |
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55 Watts |
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Memory Bandwidth
In theory, the Radeon HD 4650 512MB should be much faster than the Radeon HD 6450 (OEM) overall. (explain)
| Radeon HD 4650 512MB |
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16000 MB/sec |
| Radeon HD 6450 (OEM) |
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12800 MB/sec |
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Texel Rate
The Radeon HD 4650 512MB is a lot (about 284%) better at AF than the Radeon HD 6450 (OEM). (explain)| Radeon HD 4650 512MB |
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19200 Mtexels/sec |
| Radeon HD 6450 (OEM) |
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5000 Mtexels/sec |
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Pixel Rate
If using a high screen resolution is important to you, then the Radeon HD 4650 512MB is a better choice, and very much so. (explain)| Radeon HD 4650 512MB |
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4800 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 4650 512MBAmazon.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 4650 512MB | Radeon HD 6450 (OEM) |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Sep 10, 2008 | February 2011 |
| Code Name | RV730 PRO | Caicos |
| Memory | 512 MB | 512 MB |
| Core Speed | 600 MHz | 625 MHz |
| Memory Speed | 1000 MHz | 1600 MHz |
| Power (Max TDP) | 55 watts | 31 watts |
| Bandwidth | 16000 MB/sec | 12800 MB/sec |
| Texel Rate | 19200 Mtexels/sec | 5000 Mtexels/sec |
| Pixel Rate | 4800 Mpixels/sec | 2500 Mpixels/sec |
| Unified Shaders | 320(64x5) | 160 |
| Texture Mapping Units | 32 | 8 |
| Render Output Units | 8 | 4 |
| Bus Type | DDR2 | GDDR3 |
| Bus Width | 128-bit | 64-bit |
| Fab Process | 55 nm | 40 nm |
| Transistors | 514 million | 370 million |
| Bus | PCIe 2.0 x16, AGP 8x | 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 data (measured in MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 4650 512MBAmazon.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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