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GeForce 8800 GTS (G80) 320MB vs GeForce 8800 GTS (G80) 640MB
Intro
The GeForce 8800 GTS (G80) 320MB uses a 90 nm design. nVidia has clocked the core speed at 513 MHz. The GDDR3 memory works at a speed of 792 MHz on this specific model. It features 96 SPUs as well as 48 TAUs and 20 Rasterization Operator Units.Compare those specs to the GeForce 8800 GTS (G80) 640MB, which comes with a clock speed of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also makes use of a 320-bit bus, and uses a 90 nm design. It is made up of 96 SPUs, 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 memory bandwidth, so theoretically they should perform the same. (explain)
Texel Rate
Both cards have exactly the same texel rate, so theoretically they should be equally good at at anisotropic filtering. (explain)Pixel Rate
Both cards have the exact same pixel rate, so in theory they should be equally good at at AA, 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 max amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If 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 processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum 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!!