I need more memory. I mean personally, not in my PC - I cannot remember
anything. Can someone remind me of the formula to calculate the thermal heat
output of a CPU given its voltage, frequency etc. I know I had it writte
down somewhere, but I can't remember where I put it.
It involves squaring the voltage and multiplying by the frequency and some
other bits, but the order and extra bits in the formula escape me...
On Fri, 29 Jul 2005 16:11:12 +0100, "GT"
<ContactGT_remove_@hotmail.com> wrote:
>I need more memory. I mean personally, not in my PC - I cannot remember
>anything. Can someone remind me of the formula to calculate the thermal heat
>output of a CPU given its voltage, frequency etc. I know I had it writte
>down somewhere, but I can't remember where I put it.
That's not a fault in your memory :-)
Go to intel.com
in the search window, type THERMAL FORMULA.
"Gerard Bok" <bok118@zonnet.nl> wrote in message
news:42ea558b.7924251@News.Individual.NET...
> On Fri, 29 Jul 2005 16:11:12 +0100, "GT"
> <ContactGT_remove_@hotmail.com> wrote:
>
>>I need more memory. I mean personally, not in my PC - I cannot remember
>>anything. Can someone remind me of the formula to calculate the thermal
>>heat
>>output of a CPU given its voltage, frequency etc. I know I had it written
>>down somewhere, but I can't remember where I put it.
>
> That's not a fault in your memory :-)
> Go to intel.com
> in the search window, type THERMAL FORMULA.
>
> Less troubles than even asking in a newsgroup :-)
I get lots of links to companies selling thermal formula, such as arctic
silver etc!! Someone in here told me it months ago and if they are still
around...
On Fri, 29 Jul 2005 18:00:36 +0100, "GT"
<ContactGT_remove_@hotmail.com> wrote:
>"Gerard Bok" <bok118@zonnet.nl> wrote in message
>news:42ea558b.7924251@News.Individual.NET...
>> On Fri, 29 Jul 2005 16:11:12 +0100, "GT"
>> <ContactGT_remove_@hotmail.com> wrote:
>>
>>>I need more memory. I mean personally, not in my PC - I cannot remember
>>>anything. Can someone remind me of the formula to calculate the thermal
>>>heat
>>>output of a CPU given its voltage, frequency etc. I know I had it written
>>>down somewhere, but I can't remember where I put it.
>>
>> That's not a fault in your memory :-)
>> Go to intel.com
>> in the search window, type THERMAL FORMULA.
>>
>> Less troubles than even asking in a newsgroup :-)
>
>I get lots of links to companies selling thermal formula, such as arctic
>silver etc!! Someone in here told me it months ago and if they are still
>around...
That's because you probably used the wrong start-page :-)
I wrote: intel.com. Not google.com
"GT" <ContactGT_remove_@hotmail.com> wrote in message
news:42ea4615$0$5443$9a6e19ea@unlimited.newshostin g.com...
>I need more memory. I mean personally, not in my PC - I cannot remember
>anything. Can someone remind me of the formula to calculate the thermal
>heat output of a CPU given its voltage, frequency etc. I know I had it
>writte down somewhere, but I can't remember where I put it.
>
> It involves squaring the voltage and multiplying by the frequency and some
> other bits, but the order and extra bits in the formula escape me...
>
> Thanks.
Try this call, see if it help in your search. http://en.wikipedia.org/wiki/Electrical_resistance
best wishes..OJ
On Fri, 29 Jul 2005 16:11:12 +0100, "GT"
<ContactGT_remove_@hotmail.com> wrote:
>I need more memory. I mean personally, not in my PC - I cannot remember
>anything. Can someone remind me of the formula to calculate the thermal heat
>output of a CPU given its voltage, frequency etc. I know I had it writte
>down somewhere, but I can't remember where I put it.
>
>It involves squaring the voltage and multiplying by the frequency and some
>other bits, but the order and extra bits in the formula escape me...
>
>Thanks.
>
Yes, square the voltage an multiply the frequency. The part
you're leaving out is that each CPU core design is another
variable. You would backwards solve for that variable per
each CPU core. Even better would be to solve for several
models in the same family around the targets or average thm
all, but for the sake of simplicity (to get a near-enough
ballpark figure),
X = W/ [(Freq)*(V)²]
Probably the generic equation you wanted. Plugging some
numbers into that to determine the specific CPU core design
constant, let's consider a hypothetic CPU with the following
specs:
CPU "X" with 100W @ 3000 MHz & 1.5V, default spec.
Putting that into above equation we get,
X = 100 / [3000 * (1.5)²
X * 3000 * (1.5)² = 100
X = 0.0148
So if that CPU were at 2.0V but same Freq. we take same
equation as above to find wattage (but only for that same
specific CPU core with the 0.0148 value).
X = W/ [(Freq)*(V)²]
0.0148=W / [3000 * (2)²]
W= 0.0148 * 3000 * 4
Or if that CPU were at 1.5V default but o'c to 4GHz Freq,
0.0148 = W / [4000 * (1.5)²]
W = 0.0148 * 4000 * 2.25
W = 133.2
(should be 133.33 actually but we encounter a margin of
error because that 0.0148 variable was rounded off, was more
like 0.0148148148148/etc). Similarly all the variables have
a margin of error, your core voltage won't be spot-on
1.5000V nor bus frequency exactly same, etc,
My memory is useless... 
Linear Mode
