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GeForce 8800 GTS (G80) 320MB vs Radeon HD 3870 X2 512MB
Intro
The GeForce 8800 GTS (G80) 320MB comes with a clock speed of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also uses a 320-bit bus, and makes use of a 90 nm design. It is comprised of 96 SPUs, 48 Texture Address Units, and 20 ROPs.Compare those specs to the Radeon HD 3870 X2 512MB, which features GPU clock speed of 825 MHz, and 512 MB of GDDR3 RAM running at 900 MHz through a 256-bit bus. It also is made up of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
As far as performance goes, the Radeon HD 3870 X2 512MB should theoretically be quite a bit superior to the GeForce 8800 GTS (G80) 320MB in general. (explain)
| Radeon HD 3870 X2 512MB |
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115200 MB/sec |
| GeForce 8800 GTS (G80) 320MB |
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63360 MB/sec |
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Texel Rate
The Radeon HD 3870 X2 512MB should be a little bit (about 7%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)| Radeon HD 3870 X2 512MB |
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26400 Mtexels/sec |
| GeForce 8800 GTS (G80) 320MB |
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24624 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the Radeon HD 3870 X2 512MB is a better choice, by a large margin. (explain)| Radeon HD 3870 X2 512MB |
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26400 Mpixels/sec |
| GeForce 8800 GTS (G80) 320MB |
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10260 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.
One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.
Price Comparison
GeForce 8800 GTS (G80) 320MBAmazon.com
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Radeon HD 3870 X2 512MBAmazon.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 | Radeon HD 3870 X2 512MB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | Feb 2007 | Jan 28, 2008 |
| Code Name | G80 | R680 |
| Memory | 320 MB | 512 MB (x2) |
| Core Speed | 513 MHz | 825 MHz (x2) |
| Memory Speed | 1584 MHz | 1800 MHz (x2) |
| Power (Max TDP) | 143 watts | (Unknown) watts |
| Bandwidth | 63360 MB/sec | 115200 MB/sec |
| Texel Rate | 24624 Mtexels/sec | 26400 Mtexels/sec |
| Pixel Rate | 10260 Mpixels/sec | 26400 Mpixels/sec |
| Unified Shaders | 96 | 320(64x5) (x2) |
| Texture Mapping Units | 48 | 16 (x2) |
| Render Output Units | 20 | 16 (x2) |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 320-bit | 256-bit (x2) |
| Fab Process | 90 nm | 55 nm |
| Transistors | 681 million | (Unknown) million |
| Bus | PCIe x16 | PCIe 2.0 x16/(internal PCIe 1.1 x16) |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, 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 amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to get to the maximum fill rate.
GeForce 8800 GTS (G80) 320MBAmazon.com
Check prices at:
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Radeon HD 3870 X2 512MBAmazon.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.
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Comments
One Response to “GeForce 8800 GTS (G80) 320MB vs Radeon HD 3870 X2 512MB”[...] led me to beleive other wise, This is my old card, the 8800 gts and the 3870 x2 down from mine http://www.hwcompare.com/4846/geforc...3870-x2-512mb/ (iv put the 512mb on in here as that shows the game benchmarks) To me that seems like a pretty [...]