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GeForce 8600 GT 1GB GDDR3 vs GeForce 8600 GT 256MB GDDR3
Intro
The GeForce 8600 GT 1GB GDDR3 features a GPU core speed of 540 MHz, and the 1024 MB of GDDR3 RAM is set to run at 700 MHz through a 128-bit bus. It also features 32 SPUs, 16 TAUs, and 8 Raster Operation Units.Compare all that to the GeForce 8600 GT 256MB GDDR3, which uses a 80 nm design. nVidia has set the core speed at 540 MHz. The GDDR3 RAM is set to run at a frequency of 700 MHz on this card. It features 32 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
Both cards have exactly the same bandwidth, so in theory they should perform exactly the same. (explain)
Texel Rate
Both cards have exactly the same texel rate, so theoretically they should be equally good at at AF. (explain)Pixel Rate
Both cards have exactly the same pixel fill rate, so in theory they should perform equally good at at AA, and be able to handle 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 8600 GT 1GB GDDR3Amazon.com
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GeForce 8600 GT 256MB GDDR3Amazon.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 8600 GT 1GB GDDR3 | GeForce 8600 GT 256MB GDDR3 |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | April 2007 | April 2007 |
| Code Name | G84 | G84 |
| Memory | 1024 MB | 256 MB |
| Core Speed | 540 MHz | 540 MHz |
| Memory Speed | 1400 MHz | 1400 MHz |
| Power (Max TDP) | 47 watts | 47 watts |
| Bandwidth | 22400 MB/sec | 22400 MB/sec |
| Texel Rate | 8640 Mtexels/sec | 8640 Mtexels/sec |
| Pixel Rate | 4320 Mpixels/sec | 4320 Mpixels/sec |
| Unified Shaders | 32 | 32 |
| Texture Mapping Units | 16 | 16 |
| Render Output Units | 8 | 8 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 80 nm | 80 nm |
| Transistors | 289 million | 289 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 largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.
GeForce 8600 GT 1GB GDDR3Amazon.com
Check prices at:
|
GeForce 8600 GT 256MB GDDR3Amazon.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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