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GeForce GTX 660 vs Radeon HD 6450 (OEM) 1GB
Intro
The GeForce GTX 660 has core clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs as well as 80 TAUs and 24 Rasterization Operator Units.Compare all that to the Radeon HD 6450 (OEM) 1GB, which comes with core speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 160 SPUs as well as 8 Texture Address Units and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) 1GB |
|
31 Watts |
| GeForce GTX 660 |
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140 Watts |
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Memory Bandwidth
Theoretically speaking, the GeForce GTX 660 should be much faster than the Radeon HD 6450 (OEM) 1GB in general. (explain)
| GeForce GTX 660 |
|
144192 MB/sec |
| Radeon HD 6450 (OEM) 1GB |
|
28800 MB/sec |
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Texel Rate
The GeForce GTX 660 is quite a bit (approximately 1207%) better at texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)| GeForce GTX 660 |
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78400 Mtexels/sec |
| Radeon HD 6450 (OEM) 1GB |
|
6000 Mtexels/sec |
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Pixel Rate
If using lots of anti-aliasing is important to you, then the GeForce GTX 660 is superior to the Radeon HD 6450 (OEM) 1GB, and very much so. (explain)| GeForce GTX 660 |
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23520 Mpixels/sec |
| Radeon HD 6450 (OEM) 1GB |
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3000 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 6450 (OEM) 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTX 660 | Radeon HD 6450 (OEM) 1GB |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | September 2012 | February 2011 |
| Code Name | GK106 | Caicos |
| Fab Process | 28 nm | 40 nm |
| Bus | PCIe 3.0 x16 | PCIe 2.1 x16 |
| Memory | 2048 MB | 1024 MB |
| Core Speed | 980 MHz | 750 MHz |
| Shader Speed | 980 MHz | (N/A) MHz |
| Memory Speed | 1502 MHz (6008 MHz effective) | 900 MHz (3600 MHz effective) |
| Unified Shaders | 960 | 160 |
| Texture Mapping Units | 80 | 8 |
| Render Output Units | 24 | 4 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 64-bit |
| DirectX Version | DirectX 11.1 | DirectX 11 |
| OpenGL Version | OpenGL 4.3 | OpenGL 4.1 |
| Power (Max TDP) | 140 watts | 31 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 144192 MB/sec | 28800 MB/sec |
| Texel Rate | 78400 Mtexels/sec | 6000 Mtexels/sec |
| Pixel Rate | 23520 Mpixels/sec | 3000 Mpixels/sec |
Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
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