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What causes a processor to require exponentially more voltage beyond a certain freq? - Page 2

post #11 of 37
Quote:
Originally Posted by BallaTheFeared View Post
Gear ratio?
Wind resistance.
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post #12 of 37
It's not often you see threads like this on OCN. I myself love reading threads like this. Good stuff.
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post #13 of 37


not exactly the correct curve but good visual aid. think of the quantum curve as zoomed in.

every clock cycle a mosfet(transistor) can switch. for that switch it would go from cutoff(0v) to saturation(the level section)(.4-.7v+). voltage 'pulls' the switch, therefore the higher the voltage the faster it can go.

*the above is not 100% correct and missin a lot, however the concept basics are.
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post #14 of 37
As far as AMD vs, intel, I've found that AMDs scale pretty linearly, then just hit a wall where no amount of voltage helps. intels hit that upward curve where you have to decide if you want to get into the dangerous voltage for more speed, like it's DARING you to go further.

Except my Q6600, which hits the upward curve to 3.6, then refuses to be stable at 3.7, no matter what. It thinks it's an AMD.
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post #15 of 37
power = frequency * capacitance * voltage^2.


That power of 2 is what causes it.
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post #16 of 37
My curves:

4GHz - 1.2VCore
4.5GHz - 1.34VCore
4.8GHz - 1.44VCore
5Ghz - 1.48VCore
    
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post #17 of 37
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
power = frequency * capacitance * voltage^2.


That power of 2 is what causes it.
hmmm... can you clarify capacitance for me?
    
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post #18 of 37
Quote:
Originally Posted by Lord Xeb View Post
Heat has an affect on the silicon and messes with the way the transistors conduct electricity and stuff (my guess).

Cold - less space between atoms so less energy required to move electrons

heat - great space between atoms, thus more energy needed to move electrons.
I was thinking about the Veyron thing atually and then I read this and it fits better.

Also, never let anything hit 110-115c when using silicon.
EVER!
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post #19 of 37
Well adding to the Veyron example it needed an extra 200bhp to achieve an extra 14mph gain roughly.

The car is very heavy as well so I'm sure the extra horses were needed for the minimal speed gain.
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post #20 of 37
I was wondering the same thing; my cpu demands a drastic voltage increase anywhere beyond 4 ghz.
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