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Why GPUs and CPUs need to convert 12 volt power to 1-1.5 volts?

Last response: in Components
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May 22, 2014 8:40:19 AM

Why they can't just use 12v straight away?

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a b à CPUs
May 22, 2014 8:51:49 AM

Because the transistors are so tiny they would burn.
Volts is the amount of pressure the electrons are under.
It would be like plugging your television into a 1500 Volt socket.
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a b à CPUs
May 22, 2014 8:55:15 AM

Simple answer = Heat

You want to have the lowest voltage possible and still have transistor conduction. Since power equal voltage times amperage, if your voltage is higher then you power will be higher and your heat dissipation will be higher. Consider the Haswell 4670K, it has a typical power consumption of 68.25W @ ~1.15V with an operating temperature around 37-41C. Now multiply the voltage by 10 (12V) and you would get a power consumption of around 682.5W :ouch: . Could you imagine the heatsink that you would need to cool this thing. :lol: 
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