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GeForce 8800 GT 1GB vs Radeon HD 3870 1GB
Intro
The GeForce 8800 GT 1GB features core clock speeds of 600 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 memory. It features 112 SPUs along with 56 Texture Address Units and 16 ROPs.Compare those specifications to the Radeon HD 3870 1GB, which uses a 55 nm design. ATi has set the core speed at 775 MHz. The GDDR4 RAM works at a frequency of 1125 MHz on this specific card. It features 320(64x5) SPUs along with 16 TAUs and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce 8800 GT 1GB |
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105 Watts |
| Radeon HD 3870 1GB |
|
106 Watts |
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Memory Bandwidth
The Radeon HD 3870 1GB should theoretically be quite a bit faster than the GeForce 8800 GT 1GB overall. (explain)
| Radeon HD 3870 1GB |
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72000 MB/sec |
| GeForce 8800 GT 1GB |
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57600 MB/sec |
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Texel Rate
The GeForce 8800 GT 1GB should be quite a bit (more or less 171%) faster with regards to anisotropic filtering than the Radeon HD 3870 1GB. (explain)| GeForce 8800 GT 1GB |
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33600 Mtexels/sec |
| Radeon HD 3870 1GB |
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12400 Mtexels/sec |
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Pixel Rate
If running with lots of anti-aliasing is important to you, then the Radeon HD 3870 1GB is the winner, by a large margin. (explain)| Radeon HD 3870 1GB |
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12400 Mpixels/sec |
| GeForce 8800 GT 1GB |
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9600 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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
GeForce 8800 GT 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 3870 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Specifications
| Model | GeForce 8800 GT 1GB | Radeon HD 3870 1GB |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | Dec 2007 | Nov 19, 2007 |
| Code Name | G92 | RV670 XT |
| Fab Process | 65 nm | 55 nm |
| Bus | PCIe x16 2.0 | PCIe 2.0 x16/AGP 8x |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 600 MHz | 775 MHz |
| Shader Speed | 1500 MHz | (N/A) MHz |
| Memory Speed | 900 MHz | 1125 MHz |
| Unified Shaders | 112 | 320(64x5) |
| Texture Mapping Units | 56 | 16 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR3 | GDDR4 |
| Bus Width | 256-bit | 256-bit |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
| Power (Max TDP) | 105 watts | 106 watts |
| Shader Model | 4.0 | 4.1 |
| Bandwidth | 57600 MB/sec | 72000 MB/sec |
| Texel Rate | 33600 Mtexels/sec | 12400 Mtexels/sec |
| Pixel Rate | 9600 Mpixels/sec | 12400 Mpixels/sec |
Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 maximum number 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 ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.
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