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aMo · Post by **aMo** » Sat Apr 12, 2003 3:03 pm

People are complaining that AMD cpu's are too hot..

But my Athlon XP 1700+ is "only" 43 C/107 F normally (+/- 10%), is that so hot?

My old Athlon XP1500+ got hot, I had it up to 80 C, almost twice of my current temp...
Critical temperature for the XP1500+ is 90 C, so I was getting a bit nervous hehe.

What do you guys think is too hot?
How "cold" are your Intels?

Personally I'm having a hard time believeing that Intel is the only way to go in musicmaking...
What else does the Intels do that AMD don't?

jupiter8 · Post by **jupiter8** » Sat Apr 12, 2003 3:26 pm

AMDs DO run hotter than Intels.

So you need better cooling which can mean a noiser fan.But doesn't necessary have to if you have a good cooler for your CPU.

And an Intel mobo has an edge in stability.

But if your setup is working fine don't bother.

aMo · Post by **aMo** » Sat Apr 12, 2003 3:51 pm

Actually my AMD has a cooler that runs on 19db of noise.. can't even hear it over the harddrives and PSU...

Herr Voigt · Post by **Herr Voigt** » Sat Apr 12, 2003 4:22 pm

Can somebody show a link to a diagram or so that shows the temperatures from AMD processors?
My AMD 1400 seems to make a giant heat. After a few hours work my comp and especially my Pulsars (Pulsar 1 + Luna 2) crash down. Only if I set the system to 100 instead of 133 MHz bus clock in the BIOS, it continues working.
But my dealer told me, that he built in the best available cooler.

astroman · Post by **astroman** » Sat Apr 12, 2003 8:05 pm

you should have access to CT mag #18 from 2002 (public libraries etc).
There's a chapter 'Flüsterleise PCs' (deathsilent PCs) which explains in deepth what's going on in the CPU with heat. Highly recommended stuff.
Basically the high powered CPUs / modern mobos have a feature 'CPU throtteling' (dunno if that applies to your system) where they clock the thing down internally if it gets too hot. This happens within a millisecond - your CPU makes about 1.5 million cycles in that time

The problem is to move the heat away from the CPU which requires a polished, completely plane surface, something quite expensive to produce. So they sell a lot of fancy crap, even if it's called the best available...
I'm using a self-modified cooler with a fan running at 5V, which is one third the size of the original, 'boxed' Intel device, and yields rather the same result.

cheers, Tom

<font size=-1>[ This Message was edited by: astroman on 2003-04-12 21:07 ]</font>

Ganool · Post by **Ganool** » Sun Apr 13, 2003 12:50 am

This is partly a myth. The latest P4-processors get nearly as hot as the processors from AMD. The P4:s however got getter protection and will automatically drop to a lower frequency of it get's too hot.

aMo · Post by **aMo** » Sun Apr 13, 2003 2:02 am

I can actually change the parameters (and even turn off) the throtteling down of my AMD in my BIOS...
Not recomended offcourse...
But this means that you can set it up so it will not affect you unless really necessary..

I bought a GlacialTech Igloo Silent Breeze cooler, that is made from copper with a polished finish, it works great!
And if you don't have a polished finish on your cooler, there are several places on the net where you can buy sanding paper that is made for polishing metal to a fine finish, so that isn't really a problem, unless you're lazy

astroman · Post by **astroman** » Sun Apr 13, 2003 8:04 am

aMo, I don't think your cooler is polished. That wouldn't make sense with a 'pre-applied-component pad' and be really expensive for such a large bottom surface.
But copper is a very good heat transport, so your figures are reliable and the cooler seems a solid product for a fair amount.

You cannot 'polish' simply with sandpaper, it wouldn't produce a plane surface.
That's the most difficult part. To control this process it needs optical quality glass plates as 'masters'.

cheers, Tom

aMo · Post by **aMo** » Sun Apr 13, 2003 8:58 am

That may be..

But I can at least se my reflection on the bottom surface of my cooler.. thats good enough for me

valis · Post by **valis** » Sun Apr 13, 2003 10:31 am

On 2003-04-13 01:50, Ganool wrote:
This is partly a myth. The latest P4-processors get nearly as hot as the processors from AMD. The P4:s however got getter protection and will automatically drop to a lower frequency of it get's too hot.

You're right about better protection but I don't know about the heat issue. I run a dual xeon box here and I'm getting 28 C and 30 C respectively on my procs. Same core as p4 with diff pinout to allow for the extra agtl8+ bus interconnects that lie dormant on the regular p4.

Ganool · Post by **Ganool** » Sun Apr 13, 2003 2:34 pm

On 2003-04-13 11:31, valis wrote:

You're right about better protection but I don't know about the heat issue. I run a dual xeon box here and I'm getting 28 C and 30 C respectively on my procs. Same core as p4 with diff pinout to allow for the extra agtl8+ bus interconnects that lie dormant on the regular p4.

I did some tests of that when the 3,06 P4 was released with the fastest Athlon processor (2800+ I believe). Both processors consume almost the same amount of power.

But the P4 and the Xeon as well as a heatspreader on top of the processor core. That help a bit. But using a proper cooler with copper makes it possible to build very quiet systems even with Athlons.

Carl.

Herr Voigt · Post by **Herr Voigt** » Sun Apr 13, 2003 5:42 pm

Thank you, Astroman, for your hint. I'll read my c't 18/2002 again.

Grok · Post by **Grok** » Wed Apr 16, 2003 6:10 am

Inside the AMD vs Intel choice we have to do, it's good to know that the P4 3.06GHz HT (HyperThreading) function seems to lower the perfs for audio works