Power Consumption of Modern Graphic Cards
very interesting article, with direct measures of power for gfx card (instead of the whole computer)
Modern computer components, including graphics cards, consume more and more power, dissipate more and more heat and cause a lot more noise with their cooling systems compared to their brethren a decade ago. Today we attempt to find out the needs of modern graphics cards when it comes to power consumption. Whether you are building a home-theater PC, or a high-performance gaming system, you may be interested to learn how much power will your graphics card would like to have.read more here.
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