Intel Claims Its CPUs Have Saved $2 Billion in Energy Costs



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actually their processors have cost trillions in energy, not saved money.  if you think about it correctly.



the processor may save more power, but more people have higher watt power supplies now which uses up more energy.



A higher wattage power supply doesn't mean you're using more power than a lower wattage unit.  It's about how much power your components are actually drawing.  And because newer PSUs (which have also grown in wattage capabilities) tend to be more energy efficient than models of yesteryear, you might actually be using less power than the older model it replaced.

To grossly oversimplify (and it doesn't work out exactly like this in practice), if your system is pulling 250W, then you'll consume 250W regardless of whether you have a 700W or 1000W PSU.



That's interesting.  So even if my PSU is rated at 800W or whatever, if the total draw of my components is only 400W then my power supply should only be drawing at or near 400W?  That's nice to know.  I always assumed that because it said 800W, that's how much power it sucked up.  That makes me feel a little better about my power usage.



That's correct.  Think of it as headroom for future upgrades.  A typical desktop system doesn't come anywhere close to consuming 800W of power, and unless you're running multiple high end videocards, you have plenty of wattage headroom to play with for future upgrades.

Really want to be enlightened? Jump over to the eXtreme Power Supply Calculator, configure your setup, and hit calculate. You might be surprised at just how comparatively little power you're actually drawing.

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