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GeForce 8600 GT 256MB GDDR3 vs Radeon HD 4650 1GB
Intro
The GeForce 8600 GT 256MB GDDR3 has a core clock frequency of 540 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit bus, and makes use of a 80 nm design. It is made up of 32 SPUs, 16 Texture Address Units, and 8 ROPs.Compare that to the Radeon HD 4650 1GB, which comes with GPU core speed of 600 MHz, and 1024 MB of GDDR3 memory set to run at 700 MHz through a 128-bit bus. It also is comprised of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce 8600 GT 256MB GDDR3 |
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47 Watts |
| Radeon HD 4650 1GB |
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55 Watts |
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Memory Bandwidth
Both cards have the exact same memory bandwidth, so theoretically they should perform the same. (explain)
Texel Rate
The Radeon HD 4650 1GB is much (approximately 122%) better at anisotropic filtering than the GeForce 8600 GT 256MB GDDR3. (explain)| Radeon HD 4650 1GB |
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19200 Mtexels/sec |
| GeForce 8600 GT 256MB GDDR3 |
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8640 Mtexels/sec |
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Pixel Rate
If running with a high screen resolution is important to you, then the Radeon HD 4650 1GB is a better choice, not by a very large margin though. (explain)| Radeon HD 4650 1GB |
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4800 Mpixels/sec |
| GeForce 8600 GT 256MB GDDR3 |
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4320 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
GeForce 8600 GT 256MB GDDR3Amazon.com
Check prices at:
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Radeon HD 4650 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 | GeForce 8600 GT 256MB GDDR3 | Radeon HD 4650 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | April 2007 | Sep 10, 2008 |
| Code Name | G84 | RV730 PRO |
| Memory | 256 MB | 1024 MB |
| Core Speed | 540 MHz | 600 MHz |
| Memory Speed | 1400 MHz | 1400 MHz |
| Power (Max TDP) | 47 watts | 55 watts |
| Bandwidth | 22400 MB/sec | 22400 MB/sec |
| Texel Rate | 8640 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 4320 Mpixels/sec | 4800 Mpixels/sec |
| Unified Shaders | 32 | 320(64x5) |
| Texture Mapping Units | 16 | 32 |
| Render Output Units | 8 | 8 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 80 nm | 55 nm |
| Transistors | 289 million | 514 million |
| Bus | PCIe x16 | PCIe 2.0 x16, AGP 8x |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
GeForce 8600 GT 256MB GDDR3Amazon.com
Check prices at:
|
Radeon HD 4650 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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