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GeForce GTX 660 Ti vs Radeon HD 5850
Intro
The GeForce GTX 660 Ti uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this specific card. It features 1344 SPUs as well as 112 Texture Address Units and 24 Rasterization Operator Units.Compare those specifications to the Radeon HD 5850, which uses a 40 nm design. ATi has set the core speed at 725 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this model. It features 1440(288x5) SPUs along with 72 TAUs and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GTX 660 Ti |
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150 Watts |
| Radeon HD 5850 |
|
151 Watts |
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Memory Bandwidth
Theoretically, the GeForce GTX 660 Ti should be a small bit faster than the Radeon HD 5850 overall. (explain)
| GeForce GTX 660 Ti |
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144000 MB/sec |
| Radeon HD 5850 |
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128000 MB/sec |
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Texel Rate
The GeForce GTX 660 Ti should be quite a bit (approximately 96%) better at texture filtering than the Radeon HD 5850. (explain)| GeForce GTX 660 Ti |
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102480 Mtexels/sec |
| Radeon HD 5850 |
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52200 Mtexels/sec |
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Pixel Rate
The Radeon HD 5850 is a bit (more or less 6%) faster with regards to full screen anti-aliasing than the GeForce GTX 660 Ti, and also able to handle higher resolutions without slowing down too much. (explain)| Radeon HD 5850 |
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23200 Mpixels/sec |
| GeForce GTX 660 Ti |
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21960 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 GTX 660 TiAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 5850Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTX 660 Ti | Radeon HD 5850 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | August 2012 | September 30, 2009 |
| Code Name | GK104 | Cypress PRO |
| Fab Process | 28 nm | 40 nm |
| Bus | PCIe 3.0 x16 | PCIe 2.1 x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 915 MHz | 725 MHz |
| Shader Speed | 915 MHz | (N/A) MHz |
| Memory Speed | 1500 MHz (6000 MHz effective) | 1000 MHz (4000 MHz effective) |
| Unified Shaders | 1344 | 1440(288x5) |
| Texture Mapping Units | 112 | 72 |
| Render Output Units | 24 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 256-bit |
| DirectX Version | DirectX 11.1 | DirectX 11 |
| OpenGL Version | OpenGL 4.3 | OpenGL 3.2 |
| Power (Max TDP) | 150 watts | 151 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 144000 MB/sec | 128000 MB/sec |
| Texel Rate | 102480 Mtexels/sec | 52200 Mtexels/sec |
| Pixel Rate | 21960 Mpixels/sec | 23200 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.
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