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GeForce 8800 Ultra vs Radeon HD 4890 2GB
Intro
The GeForce 8800 Ultra uses a 90 nm design. nVidia has clocked the core speed at 612 MHz. The GDDR3 RAM works at a frequency of 1080 MHz on this particular card. It features 128 SPUs as well as 64 Texture Address Units and 24 Rasterization Operator Units.Compare those specifications to the Radeon HD 4890 2GB, which has GPU core speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 975 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce 8800 Ultra |
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171 Watts |
| Radeon HD 4890 2GB |
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190 Watts |
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Memory Bandwidth
The Radeon HD 4890 2GB, in theory, should be a small bit faster than the GeForce 8800 Ultra in general. (explain)
| Radeon HD 4890 2GB |
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124800 MB/sec |
| GeForce 8800 Ultra |
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103680 MB/sec |
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Texel Rate
The Radeon HD 4890 2GB is just a bit (approximately 2%) faster with regards to AF than the GeForce 8800 Ultra. (explain)| Radeon HD 4890 2GB |
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40000 Mtexels/sec |
| GeForce 8800 Ultra |
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39168 Mtexels/sec |
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Pixel Rate
The Radeon HD 4890 2GB will be a small bit (more or less 9%) better at FSAA than the GeForce 8800 Ultra, and also will be capable of handling higher screen resolutions more effectively. (explain)| Radeon HD 4890 2GB |
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16000 Mpixels/sec |
| GeForce 8800 Ultra |
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14688 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 UltraAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 4890 2GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce 8800 Ultra | Radeon HD 4890 2GB |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | May 2007 | Apr 2, 2009 |
| Code Name | G80 | RV790 XT |
| Fab Process | 90 nm | 55 nm |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| Memory | 768 MB | 2048 MB |
| Core Speed | 612 MHz | 1000 MHz |
| Shader Speed | 1500 MHz | (N/A) MHz |
| Memory Speed | 1080 MHz | 975 MHz |
| Unified Shaders | 128 | 800(160x5) |
| Texture Mapping Units | 64 | 40 |
| Render Output Units | 24 | 16 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 384-bit | 256-bit |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.0 |
| Power (Max TDP) | 171 watts | 190 watts |
| Shader Model | 4.0 | 4.1 |
| Bandwidth | 103680 MB/sec | 124800 MB/sec |
| Texel Rate | 39168 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 14688 Mpixels/sec | 16000 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 are applied per second. This figure is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
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