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GeForce 8800 GTS (G80) 320MB vs GeForce 8800 GTS (G80) 640MB
Intro
The GeForce 8800 GTS (G80) 320MB comes with core clock speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 memory. It features 96 SPUs as well as 48 TAUs and 20 ROPs.Compare those specifications to the GeForce 8800 GTS (G80) 640MB, which makes use of a 90 nm design. nVidia has clocked the core speed at 513 MHz. The GDDR3 memory is set to run at a speed of 792 MHz on this model. It features 96 SPUs along with 48 TAUs and 20 ROPs.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have the exact same bandwidth, so in theory they should perform the same. (explain)
Texel Rate
Both cards have exactly the same texel fill rate, so in theory they should be equally good at at anisotropic filtering. (explain)Pixel Rate
Both cards have exactly the same pixel rate, so theoretically they should perform equally good at at full screen anti-aliasing, and be capable of handling the same screen resolutions. (explain)
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 GTS (G80) 320MBAmazon.com
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GeForce 8800 GTS (G80) 640MBAmazon.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 | GeForce 8800 GTS (G80) 320MB | GeForce 8800 GTS (G80) 640MB |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | Feb 2007 | Nov 2006 (640) |
| Code Name | G80 | G80 |
| Memory | 320 MB | 640 MB |
| Core Speed | 513 MHz | 513 MHz |
| Memory Speed | 1584 MHz | 1584 MHz |
| Power (Max TDP) | 143 watts | 143 watts |
| Bandwidth | 63360 MB/sec | 63360 MB/sec |
| Texel Rate | 24624 Mtexels/sec | 24624 Mtexels/sec |
| Pixel Rate | 10260 Mpixels/sec | 10260 Mpixels/sec |
| Unified Shaders | 96 | 96 |
| Texture Mapping Units | 48 | 48 |
| Render Output Units | 20 | 20 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 320-bit | 320-bit |
| Fab Process | 90 nm | 90 nm |
| Transistors | 681 million | 681 million |
| Bus | PCIe x16 | PCIe x16 |
| DirectX Version | DirectX 10 | DirectX 10 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 are applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
GeForce 8800 GTS (G80) 320MBAmazon.com
Check prices at:
|
GeForce 8800 GTS (G80) 640MBAmazon.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
One Response to “GeForce 8800 GTS (G80) 320MB vs GeForce 8800 GTS (G80) 640MB”esse site e uns dos melhores ...continuem assim vlw!!