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GeForce 9800 GTX+ vs Radeon HD 3870 512MB
Intro
The GeForce 9800 GTX+ uses a 55 nm design. nVidia has clocked the core speed at 738 MHz. The GDDR3 RAM runs at a speed of 1100 MHz on this specific card. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.Compare those specs to the Radeon HD 3870 512MB, which features GPU clock speed of 775 MHz, and 512 MB of GDDR3 RAM running at 900 MHz through a 256-bit bus. It also is made up of 320(64x5) Stream Processors, 16 TAUs, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 3870 512MB |
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106 Watts |
| GeForce 9800 GTX+ |
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145 Watts |
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Memory Bandwidth
The GeForce 9800 GTX+ should theoretically perform quite a bit faster than the Radeon HD 3870 512MB overall. (explain)
| GeForce 9800 GTX+ |
|
70400 MB/sec |
| Radeon HD 3870 512MB |
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57600 MB/sec |
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Texel Rate
The GeForce 9800 GTX+ will be much (about 281%) faster with regards to anisotropic filtering than the Radeon HD 3870 512MB. (explain)| GeForce 9800 GTX+ |
|
47232 Mtexels/sec |
| Radeon HD 3870 512MB |
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12400 Mtexels/sec |
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Pixel Rate
The Radeon HD 3870 512MB should be a small bit (more or less 5%) more effective at anti-aliasing than the GeForce 9800 GTX+, and also will be able to handle higher resolutions better. (explain)| Radeon HD 3870 512MB |
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12400 Mpixels/sec |
| GeForce 9800 GTX+ |
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11808 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
GeForce 9800 GTX+Amazon.com
Check prices at:
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Radeon HD 3870 512MBAmazon.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.
Specifications
| Model | GeForce 9800 GTX+ | Radeon HD 3870 512MB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | July 2008 | Nov 19, 2007 |
| Code Name | G92b | RV670 XT |
| Memory | 512 MB | 512 MB |
| Core Speed | 738 MHz | 775 MHz |
| Memory Speed | 2200 MHz | 1800 MHz |
| Power (Max TDP) | 145 watts | 106 watts |
| Bandwidth | 70400 MB/sec | 57600 MB/sec |
| Texel Rate | 47232 Mtexels/sec | 12400 Mtexels/sec |
| Pixel Rate | 11808 Mpixels/sec | 12400 Mpixels/sec |
| Unified Shaders | 128 | 320(64x5) |
| Texture Mapping Units | 64 | 16 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR3 | GDDR3 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 55 nm | 55 nm |
| Transistors | 754 million | (Unknown) million |
| Bus | PCIe x16 2.0 | PCIe 2.0 x16/AGP 8x |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant 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.
GeForce 9800 GTX+Amazon.com
Check prices at:
|
Radeon HD 3870 512MBAmazon.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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