"EzAk" <> wrote in message
news:QLudnSFCPdlc8a7cRVn-...
> i see what you are saying now, thank you
No probs
> now without touching the processor,
> Is the only problem with raising the voltage heat?
> if so in "thery" could i raise the vcore up to 4 if the processor was
> running >20c and everything be ok?
I am not sure. If you had said 2.5v, I would have said yes, "in theory".
But as you get higher and higher voltages, I am not sure what the
theoretical limits are.
I am very rusty on all this stuff, so please forgive the lack of detail and
specific numbers, but the principle is this:
Think of all the transistors in a CPU representing "0"'s and "1"'s,
depending on what voltage they are outputting. The reality is that the
voltage doesn't switch from "low" to "high" (or vica versa) instantly. It
takes time. This is because of capacitance in the system. As electrons
flow in to part of the CPU, the voltage rises steadily as the capacitance is
filled up.
The speed at which the voltage ramps up determines how fast the chip can
run. Consider an individual component that is supposed to be saying "1".
Its voltage is rising up quickly - so that it can represent a "1" - but you
come along an try to measure it too fast and the voltage hasn't got high
enough yet and you read some intermediate value. Which gets interpreted as
a "0". The chip is producing errors because you are trying to run it too
fast.
Slow the MHz down and the problem goes away: the components now have time
to charge up properly.
So how can you make the chip run faster? Well you can do 2 things.
1. You can increase the voltage supplying the chip. This makes things
charge up faster, and therefore they reach the "1" state quicker and
therefore you can run it faster.
2. You can try to decrease the resistance of the chip's internal tracks.
This also enables things to charge up faster. You do this by cooling the
chip, becuase the resistance is lower at lower temperatures. This also
helps with 1. The trouble with increasing the voltage is that it also
increases the amount of heat generated inside the chip.
But so much for the "theory". In reality, there are real limits. You reach
a point where you can't remove enough heat. The problem is that the heat is
generated inside the CPU and yet the heatsink sits outside the CPU. So the
heat generated inside each tiny little component inside the CPU can only
escape so fast, because its got the rest of the CPU to travel through. So
even if you have a liquid-helium cooled heatsink, you still reach a point
where the heat generated will burn it out. It might be -273C on the
outside, but it will still be too hot at the CPU component level.
So, yes "in theory", if you could keep the *internal* CPU temps around 20C
everything would be OK. But its impossible.
Chip
>
> Chip wrote:
>
> > "EzAk" <> wrote in message
> > news:k7mdnRW_HrrVv6_cRVn-...
> >
> >>Not sure but have you seen this:
> >>http://www.cpuheat.wz.cz/html/AXP_mu...Multiplier.htm
> >>(about half way down the page look for the caption "How to create Mobile
> >>Athlon (desktop to mobile change)"
> >
> >
> > Thanks, but I know this already.
> >
> > I think you are perhaps a little confused: This process does not turn a
> > normal CPU into a mobile one. It enables a normal CPU to run as if it
were
> > a mobile one. See the difference?
> >
> > Mobile processors will tend to be able to clock higher and have the
added
> > benefits that they are unlocked and run on lower voltages (and have
higher
> > heat tolerance too.) They don't clock higher *because* they run on
lower
> > voltages and have higher heat tolerances. So fooling a normal CPU into
> > thinking its a mobile doesn't "magically" make it a better overclocker.
> >
> > Chip
> >
> >
>