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Radeon HD 4650 1GB vs Radeon HD 4670 1GB
Intro
The Radeon HD 4650 1GB features a core clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.Compare those specs to the Radeon HD 4670 1GB, which has GPU clock speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory set to run at 1100 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.
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 should be a lot faster than the Radeon HD 4650 1GB overall. (explain)
| Radeon HD 4670 1GB |
|
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 is quite a bit (more or less 25%) better 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 a high resolution is important to you, then the Radeon HD 4670 1GB is a better choice, 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 maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max 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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