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GeForce 8800 GT 512MB vs Radeon HD 4650 1GB
Intro
The GeForce 8800 GT 512MB has core speeds of 600 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 112 SPUs along with 56 TAUs and 16 ROPs.Compare all that to the Radeon HD 4650 1GB, which comes with GPU clock speed of 600 MHz, and 1024 MB of GDDR3 memory running at 700 MHz through a 128-bit bus. It also is comprised of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 4650 1GB |
|
55 Watts |
| GeForce 8800 GT 512MB |
|
105 Watts |
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Memory Bandwidth
In theory, the GeForce 8800 GT 512MB is 157% quicker than the Radeon HD 4650 1GB in general, because of its higher bandwidth. (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 is much (approximately 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 lots of anti-aliasing is important to you, then the GeForce 8800 GT 512MB is superior to the Radeon HD 4650 1GB, by a large margin. (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 (in units of MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
GeForce 8800 GT 512MBAmazon.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.
|
Comments
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