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GeForce GTX 660 vs Radeon HD 5770
Intro
The GeForce GTX 660 features a core clock speed of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 192-bit memory bus, and uses a 28 nm design. It features 960 SPUs, 80 TAUs, and 24 ROPs.Compare those specs to the Radeon HD 5770, which comes with clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5770 |
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108 Watts |
| GeForce GTX 660 |
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140 Watts |
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Memory Bandwidth
As far as performance goes, the GeForce GTX 660 should theoretically be a lot better than the Radeon HD 5770 in general. (explain)
| GeForce GTX 660 |
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144192 MB/sec |
| Radeon HD 5770 |
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76800 MB/sec |
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Texel Rate
The GeForce GTX 660 is quite a bit (approximately 131%) faster with regards to AF than the Radeon HD 5770. (explain)| GeForce GTX 660 |
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78400 Mtexels/sec |
| Radeon HD 5770 |
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34000 Mtexels/sec |
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Pixel Rate
The GeForce GTX 660 should be much (approximately 73%) more effective at AA than the Radeon HD 5770, and also capable of handling higher resolutions better. (explain)| GeForce GTX 660 |
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23520 Mpixels/sec |
| Radeon HD 5770 |
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13600 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 660Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 5770Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTX 660 | Radeon HD 5770 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | September 2012 | October 13, 2009 |
| Code Name | GK106 | Juniper XT |
| Fab Process | 28 nm | 40 nm |
| Bus | PCIe 3.0 x16 | PCIe 2.1 x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 980 MHz | 850 MHz |
| Shader Speed | 980 MHz | (N/A) MHz |
| Memory Speed | 1502 MHz (6008 MHz effective) | 1200 MHz (4800 MHz effective) |
| Unified Shaders | 960 | 800(160x5) |
| Texture Mapping Units | 80 | 40 |
| Render Output Units | 24 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 128-bit |
| DirectX Version | DirectX 11.1 | DirectX 11 |
| OpenGL Version | OpenGL 4.3 | OpenGL 3.2 |
| Power (Max TDP) | 140 watts | 108 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 144192 MB/sec | 76800 MB/sec |
| Texel Rate | 78400 Mtexels/sec | 34000 Mtexels/sec |
| Pixel Rate | 23520 Mpixels/sec | 13600 Mpixels/sec |
Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. 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, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.
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