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How high a temp can I safely run a Celeron Taluatin passively cooled?

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smilingcrow

Member
Joined
Mar 9, 2002
Location
The belly of the beast (Wales)
I¡¦m looking to build a Silent PC or as close as I can get to that ideal and have decided that a Taluatin Celeron is a good place to start. My previous desktop was my first quiet PC project and was built around a passively cooled Celeron 600 (Coppermine).

I ran the C600 at 1.3V as opposed to the default 1.5V, used Arctic Silver thermal paste and a copper Golden Orb without the fan connected. It idled at around 35C and hit about 50C under continuous full load and was perfectly stable, I used Win 2K ļ

I don¡¦t mind if the CPU only lasts a year as it¡¦s a cheap unit and easily replaced but I know I¡¦ll probably going to have to run the Taluatin Celeron 1.0A at a higher temperature due to the greater power dissipation. I¡¦m trying to gauge what a sensible idle and full load temperature I should aim for given my objective for passive cooling.

I intend trying a voltage of 1.2V which I think the Abit ST6 supports, again using Arctic Silver thermal paste and the likely candidate for a heat sink is the Zalman Flower cooler with the fan disabled. I¡¦d guess that this heatsink is more efficient than the golden orb but I¡¦m not sure how the integrated heat spreader of the Taluatin unit will effect thermal conductivity? I estimate that this combination will idle nearer 45C and hit 60C under full load. I know these units are specified for 70C so maybe I¡¦m just being a ***** and there will be no problem. But then again the thermal values for both systems will be collected with Motherboard Monitor and taken from the motherboards onboard monitoring which will probably be inaccurate so I¡¦d rather have more headroom here. BTW the Celeron 600 was housed on an Abit SL6 (815E chipset).

One other thing hit me recently which is that mobile Taluatins are rated differently for temperature operating range than the desktop equivalents. The desktops max out at 70C while the mobiles manage 100C.
Why such a large difference in max operating temperature as surely the CPUs are physically very similar? I know the mobiles are designed to use less power but how does that effect operating temperature range?

It begs the question are Intel being very conservative in defining 70C as the max temperature for desktop CPUs? My Toshiba laptop has a P3 650 and the fan only kicks in when the CPU temperature as monitored by Motherboard Monitor hits 60C.


The bottom line: How hot should I risk running a Taluatin desktop processor?

Will the CPU become unstable before being damaged or will the onboard diode automatically shut down the system before it reaches a temperature where instability occurs? I¡¦d forgotten about the auto shutdown feature. At what temperature does that kick in?


Any feedback appreciated which might seem anomalous given my aim for silence :)

Smiling Crow
 

ol' man

Member
Joined
Aug 23, 2001
I have ran my PIII tualatin to 75 deg. C I believe passively cooled. It was not on purposemind but it was doing it when I took the snappy. On purpose I ran my cel-t to I believe 68 deg. C before it puked. These two instances were with the vcore at 1.2~1.3v and the hurtz at default!
 

crose

Registered
Joined
Feb 17, 2002
I know you want it to be absolutly quiet but is it really necessary to run completly without a fan? I'm using Papst 80mm fan that runs at 1500rpm. They are inaudiable. Note that I'm not saying it's inaudiable when I'm using my Delta Screamer (don't have one BTW) at the same time. I started the fan with all other things which can generate sound shut off and I couldn't hear it spin or sound of air blowing. OK, my ear was about 20cm from the fan because I didn't want to shave my ear/hair off.
 

ShiFtY2001

Registered
Joined
Feb 25, 2002
Location
New Zealand
This is an interesting topic... i am doing the same thing, my idea is to mount a on/off switch and speed control for the cpu (delta 60mm) and case fan (90mm generic) in the same circuit. I will run the psu fan at 7V, and passive cool my geforce 2 ti using a tualatin heatsink and RAMsinks, with the case fan blowing towards them.

This is so you can have quietness for things like word processing/surfing the net, but also can turn on the cooling when you are gaming/rendering/other cpu intensive tasks. Having this control is very worthwhile, i might see if i can automate it using a temp sensor and a relay or something.

I will put this on my website when i get it done. Tell me if your idea works, those zalman flower thingees look ace!

~ShiFtY out~
 

[email protected]

Member
Joined
Jan 28, 2002
Location
Ontario, Canada
Hey, I have a tulaltin CPU, 1.2 ghz, which i got for $60 shipping from ebay, on passive cooling, I have two low speed fans in the setup, and only a hs on the cpu, its my moms pc, she wanted one that made basically no noise at all, and its almost silent in her room, I believe the temps are 38 C load, and 48C load, but she really dont do that much on it, other than taxes, and the occasional email though., but i'll have to double check the temps on it, also it is under volted, but i dont know how much cause my bro did it, I'll ask him, and post up, tomorrow after i get back from wrestlemania X8!
 

ol' man

Member
Joined
Aug 23, 2001
I think it should be okay as long as there is sopme movement of air in your case.
 

kevmarks

Member
Joined
Mar 3, 2002
Location
Chicago
I ran the C600 at 1.3V as opposed to the default 1.5V, used Arctic Silver thermal paste and a copper Golden Orb without the fan connected. It idled at around 35C and hit about 50C under continuous full load and was perfectly stable, I used Win 2K ļ

Thats great news for me. I am thinking of passivly cooling a Coppermine 600 with a Swifttech MCXC370 the copper bottomed helicoid pin thing. Overkill you might say, but it is left over from my old T-Bird days. Has anybody installed one of these bad boys on a socket 370? It's going on a slocket in a slot1 Abit BH6. So I think the slocket may need a little extra support to deal with the weight. Any suggestions?

Hopefully the only sound this system should make is in the PSU and hard disk :)