> In private correspondence, re claims about AMD versus Intel PC CPU
operating
> temperatures,  Rod wrote
>
> > Have trouble believing there is much difference between I and AMD
...
>
> It's garbage.

I agree, if "it's" is AMD.

> (Someone had written)
> >> ... , but did you know that with the fan/heatsink off an AMD
> >> Palomino runs at 5680F and an AMD Athlon 1400 it run at 6980F! If
the fan
> >> fails that leaves only the heatsink to dissipate all that heat.

That's insane.

> >> In comparison, the Intel Pentium 4 2Ghz runs at 840F and the Intel
> Pentium
> >> III 1Ghz runs at 1000F with the fan/heatsink off.

That's a little more reasonable, but still way too high.  840F and the
socket would probably melt.  AMD can get to 700C with not sink or fan,
but's it toast then.

> ALL modern processors draw extremely high currents at low voltage.
> Haven't looked up requirements but probably 20A plus plus at 1.5 to 3
volts.

More like 30A.

> Even 20 watts (below any of above) on an unheatsunk chip will fry it
vvv
> quickly.

I agree.

> It may be that Intel's cpu's have a little more thermal mass than AMDs
which
> may allow them to survive for a few more seconds totally unheatsunk.
(But an
> eg  Celeron 1700 looks pretty minimal in any sort of mass to me).
>
> Just possibly Intel's heatsinks are superior and without a fan they
run
> cooler.

Intels run much cooler than AMD's, IME.  You can't touch the heatsink on
an AMD without losing some skin.  An Intel heatsink is hardly warm.

> But even then the temperatures they claim are bunk.
> 84 F = 27C

According to the BIOS, most Intels run around 100F in normal usage.
They get somewhat warmer when running Quake.  ;-)

> The heatsink on the Celeron 1700 I installed a few days ago runs
annoyingly
> hot with VERY large Intel heatsink and fan. I'd say around 50C !

That seems a little warm, but nothing major.

> Anyone here have any REAL figures?

IME, Intels run *much* cooler than AMD's.  If the heatsink falls off an
AMD, it's goodbye CPU, board, memory and maybe the video card.  The CPU
will melt the socket.  I've seen a couple of claims that AMD's will run
up to 700C after removing the sink.  Of course it's nothing but a space
heater at that point.  I've seen this happen more than once.

I've never seen an Intel sink just "fall off", but AIUI the Intel will
not burn up.  Tom's hardware has some pretty cool video making a
comparison.

It's funny this should come up, as I just got beat up a little in a.e.e
over this very issue.  The datasheets aparently indicate that AMD and
Intel run at the same temp.  That's a complete crock.  ;-)

michael brown

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