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GeForce 8800 GT 512MB vs Radeon HD 4650 1GB
Intro
The GeForce 8800 GT 512MB features a core clock speed of 600 MHz and a GDDR3 memory frequency of 900 MHz. It also uses a 256-bit memory bus, and makes use of a 65 nm design. It features 112 SPUs, 56 TAUs, and 16 ROPs.Compare those specifications to the Radeon HD 4650 1GB, which comes with a clock frequency of 600 MHz and a GDDR3 memory frequency of 700 MHz. It also uses 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 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4650 1GB |
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55 Watts |
| GeForce 8800 GT 512MB |
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105 Watts |
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Memory Bandwidth
Performance-wise, the GeForce 8800 GT 512MB should theoretically be much superior to the Radeon HD 4650 1GB overall. (explain)
| GeForce 8800 GT 512MB |
|
57600 MB/sec |
| Radeon HD 4650 1GB |
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22400 MB/sec |
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Texel Rate
The GeForce 8800 GT 512MB should be quite a bit (about 75%) more effective at AF than the Radeon HD 4650 1GB. (explain)| GeForce 8800 GT 512MB |
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33600 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 GeForce 8800 GT 512MB is superior to the Radeon HD 4650 1GB, and very much so. (explain)| GeForce 8800 GT 512MB |
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9600 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
GeForce 8800 GT 512MBAmazon.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 8800 GT 512MB | Radeon HD 4650 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | Oct 2007 | Sep 10, 2008 |
| Code Name | G92 | RV730 PRO |
| Memory | 512 MB | 1024 MB |
| Core Speed | 600 MHz | 600 MHz |
| Memory Speed | 1800 MHz | 1400 MHz |
| Power (Max TDP) | 105 watts | 55 watts |
| Bandwidth | 57600 MB/sec | 22400 MB/sec |
| Texel Rate | 33600 Mtexels/sec | 19200 Mtexels/sec |
| Pixel Rate | 9600 Mpixels/sec | 4800 Mpixels/sec |
| Unified Shaders | 112 | 320(64x5) |
| Texture Mapping Units | 56 | 32 |
| Render Output Units | 16 | 8 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 65 nm | 55 nm |
| Transistors | 754 million | 514 million |
| Bus | PCIe x16 2.0 | 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 information (counted in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
GeForce 8800 GT 512MBAmazon.com
Check prices at:
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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.
|
Comments
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