# CPU pin currents?

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I am looking for some info about CPU pin currents. In various
white-papers on the web it is ussualy mentioned summary current Icc
(cca. 50...80 A for modern processors).
If anyone can tell me where to find typical pin-by-pin distribution of
this current, it would make my day - it is a bet in question here :))
doesnt matter for which processor, but it would be nice if it is widely
known one.

tnx, and excuses for bad english

## Re: CPU pin currents?

Divide the current by the number of pins?

Phil Weldon

|I am looking for some info about CPU pin currents. In various
| white-papers on the web it is ussualy mentioned summary current Icc
| (cca. 50...80 A for modern processors).
| If anyone can tell me where to find typical pin-by-pin distribution of
| this current, it would make my day - it is a bet in question here :))
| doesnt matter for which processor, but it would be nice if it is widely
| known one.
|
| tnx, and excuses for bad english

## Re: CPU pin currents?

not all pins are power pins though.....

--
From Overlag - Adam Webb

## Re: CPU pin currents?

I meant, of course, the power pins.

Phil Weldon

|> Divide the current by the number of pins?
| >
| > Phil Weldon
| >
|
| not all pins are power pins though.....
|
| --
| From Overlag - Adam Webb
|
|

## Re: CPU pin currents?

Phil Weldon wrote:

thanks for suggestion, I came to that myself, but it will not solve this
bet.
My opponent does not believe that is even possible that such large
currents occure in CPU core. He doesnt believe in simple equation I=P/U
(where P is thermal dissipation of processor, and U is core voltage)...
I guess that I get what I deserve when I am betting with such idiot :(

Anyway, my tought was if you know a web page where we can see pin-by-pin
distribution of currents, it would convince him. And I could win that
beer... :)))

## Re: CPU pin currents?

'zmaj'wrote:
| thanks for suggestion, I came to that myself, but it will not solve this
| bet.
| My opponent does not believe that is even possible that such large
| currents occure in CPU core. He doesnt believe in simple equation I=P/U
| (where P is thermal dissipation of processor, and U is core voltage)...
| I guess that I get what I deserve when I am betting with such idiot :(
_____

If your opponent does not believe in Ohm's Law, then no matter what evidence
you present, you're going to have trouble collecting.  The best I can do is
this URL
ftp://download.intel.com/design/Pentium4/datashts/30056103.pdf .

It is the data sheet for Pentium 4 800 MHz FSB CPUs.  It gives the maximum
current for each of the CPU models in that series on page 22.  That should
be all you need.  The data sheet also identifies each Vcc pin and Vss pin
(85 power pins and 179 ground pins.)

Phil Weldon

| Phil Weldon wrote:
| > Divide the current by the number of pins?
| >
| > Phil Weldon
| >
| >
|
|
| thanks for suggestion, I came to that myself, but it will not solve this
| bet.
| My opponent does not believe that is even possible that such large
| currents occure in CPU core. He doesnt believe in simple equation I=P/U
| (where P is thermal dissipation of processor, and U is core voltage)...
| I guess that I get what I deserve when I am betting with such idiot :(
|
| Anyway, my tought was if you know a web page where we can see pin-by-pin
| distribution of currents, it would convince him. And I could win that
| beer... :)))

## Re: CPU pin currents?

zmaj wrote:

For your purpose it doesn't matter what the pin distribution is and
manufacturer data sheets give the current draw, so you can look it up
there, but just what does he think the heat comes from? There ain't some
little guy in there shoving coal into a furnace, you know ;)