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GeForce 8600 GT 256MB GDDR3 vs Radeon HD 4650 1GB
Intro
The GeForce 8600 GT 256MB GDDR3 features a core clock speed of 540 MHz and a GDDR3 memory frequency of 700 MHz. It also makes use of a 128-bit memory bus, and uses a 80 nm design. It is made up of 32 SPUs, 16 TAUs, and 8 ROPs.Compare those specs to the Radeon HD 4650 1GB, which comes with a clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also features a 128-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce 8600 GT 256MB GDDR3 |
|
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 will be a lot (more or less 122%) more effective at texture 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 lots of anti-aliasing is important to you, then the Radeon HD 4650 1GB is the winner, but only just. (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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, 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 most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory 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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