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Radeon HD 4650 1GB vs Radeon HD 4670 1GB
Intro
The Radeon HD 4650 1GB has a core clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.Compare all that to the Radeon HD 4670 1GB, which has GPU clock speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 RAM running at 1100 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 32 TAUs, and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4650 1GB |
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55 Watts |
| Radeon HD 4670 1GB |
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70 Watts |
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Memory Bandwidth
In theory, the Radeon HD 4670 1GB will be 57% faster than the Radeon HD 4650 1GB in general, because of its greater data rate. (explain)
| Radeon HD 4670 1GB |
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35200 MB/sec |
| Radeon HD 4650 1GB |
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22400 MB/sec |
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Texel Rate
The Radeon HD 4670 1GB should be much (approximately 25%) more effective at AF than the Radeon HD 4650 1GB. (explain)| Radeon HD 4670 1GB |
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24000 Mtexels/sec |
| Radeon HD 4650 1GB |
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19200 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the Radeon HD 4670 1GB is the winner, by far. (explain)| Radeon HD 4670 1GB |
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6000 Mpixels/sec |
| Radeon HD 4650 1GB |
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4800 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 1GBAmazon.com
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Radeon HD 4670 1GBAmazon.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 4650 1GB | Radeon HD 4670 1GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Sep 10, 2008 | Sep 10, 2008 |
| Code Name | RV730 PRO | RV730 XT |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 600 MHz | 750 MHz |
| Memory Speed | 1400 MHz | 2200 MHz |
| Power (Max TDP) | 55 watts | 70 watts |
| Bandwidth | 22400 MB/sec | 35200 MB/sec |
| Texel Rate | 19200 Mtexels/sec | 24000 Mtexels/sec |
| Pixel Rate | 4800 Mpixels/sec | 6000 Mpixels/sec |
| Unified Shaders | 320(64x5) | 320(64x5) |
| Texture Mapping Units | 32 | 32 |
| Render Output Units | 8 | 8 |
| Bus Type | GDDR3 | GDDR4/GDDR3/DDR3/DDR2 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 55 nm | 55 nm |
| Transistors | 514 million | 514 million |
| Bus | PCIe 2.0 x16, AGP 8x | PCIe 2.0 x16, AGP 8x |
| DirectX Version | DirectX 10.1 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 applied per second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
Radeon HD 4650 1GBAmazon.com
Check prices at:
|
Radeon HD 4670 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.
|
Comments
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