Coolest Celeron?

JEN · Post by **JEN** » Tue Nov 18, 2003 10:30 pm

Does anyone know if the celeron SL46U is the cool 1.5VCore type which comes in at 3rd place in the CPUs Ranked by Noise / Heat page of this site?

If yes, I am after 1 of the following, but need to know if they are the supercool type

:

1. SL46U 600 MHz cB0 128 600 MHz 9,0 RB80526RX600128 0683 1,500 12,60 90 0,18 ECC OEM
2. SL3W8 600 MHz cB0 128 600 MHz 9,0 BX80526F600128 0683 1,500 12,60 90 0,18 ECC Boxed
3. SL46T 566 MHz cB0 128 566 MHz 8,5 RB80526RX566128 0683 1,500 11,90 90 0,18 ECC OEM
4. SL3W7 566 MHz cB0 128 566 MHz 8,5 BX80526F566128 0683 1,500 11,90 90 0,18 ECC Boxed
5. SL46S 533A MHz cB0 128 533 MHz 8,0 NA 0683 1,500 11,20 90 0,18 ECC OEM

How do these CPUs compare with the VIA C-3 and the VIA EDEN, in terms of performance/price/heat/electricity usage?

Also, anyone know where I can get hold of them from the UK ???

Thanks

Post by **Ralf Hutter** » Wed Nov 19, 2003 5:42 am

Those are 3-4 year old CPUs that are long out of production. ebay is your most likely source.

JEN · Post by **JEN** » Wed Nov 19, 2003 9:25 am

Which processor would you recommend after considering the following:

After reading a review between the C3 1000 and the celeron 667MHz, I realised that the 667 outperformce the C3 1000 in most rests. The only time the C3 1000 wins over the celeron 667 is with games.

There is not much difference in speed between the 667 and the 566, plus you can get the 566 for around £10.

After considering all this, I think it makes more sence to get the celeron over the C3, as long as you are not interested in games.

What do you think ???

DonP · Post by **DonP** » Wed Nov 19, 2003 11:34 am

I've got two SL3W8s.. bought them years and years ago.. the performance is pretty good.. plenty for office apps.. enough for DVD playback and also DivX playback.. heat/noise wise.. I don;t really know.. they're in very cheap (read loud) cases.. stock Intel HSF.
The main problem I have with these systems is that they're not fast enough to play full screen digital TV (Hauppage DVB Nova-t).. not sure why.. but the hauppage software runs bad on a P4 2.26B also.. so it could be just crap software (and it is pretty crap).

As to source.. I think Ralf is right.. Ebay may be the only place - I was looking for P3 CPUs and I can't find them anywhere other than EBay.

DonP.

PS When buying the P3-class Celerons do be careful of the distinction between S370, PPGA, FC-PGA and FC-PGA2. Basically (I think) the first three are the same.. the last one is more like S478.

JEN · Post by **JEN** » Thu Nov 20, 2003 5:42 am

Thanks for the help

Is it possible to run this processor (socket 360 celeron 566MHz SL46T or SL3W7) with any standard socket 370 heatsink without the fan (passive cooled) ???

[edit - I know I have a stock amd athlon heatsink somewhere, can that be used ???]

mrzed · Post by **mrzed** » Thu Nov 20, 2003 4:44 pm

Do you already have an old socket 370 board that you are planning on putting this in? If you are building from the ground up, the Tualatin celerons are both faster and potentially cooler running. I have heard of people running fanless up to 1.2Ghz with a big heatsink and good airflow. Undervolting a 1.0A or 1.1A should allow for a CPU MUCH faster than either a coppermine or a C3.

But if you already have a line on a cheap 566, It should be plenty for general usage. Though I think you will need a better than average heatsink to run passive.

JEN · Post by **JEN** » Thu Nov 20, 2003 10:06 pm

Hi thanks for that info.

I have a look at the specs the the Tualatin processor and I found that its VCore is 1.5 but its thermal power output requirements are around 30W.

Whereas, the coppermine 566 also has a VCore of 1.5 but only 11W is required, therefore, less electricity bill

Assuming I go for the Tualatin and undervolt it to 1.0VCore, what will the thermal power output be reduced to?

While I was looking for info for the Tualatin, I noticed the M-Mobile celeron which only needs around 3W of power !!! Is it possible to build a desktop pc using this mobile processor ???

Thanks for the info

Post by **Ralf Hutter** » Fri Nov 21, 2003 4:22 am

JEN wrote:While I was looking for info for the Tualatin, I noticed the M-Mobile celeron which only needs around 3W of power !!! Is it possible to build a desktop pc using this mobile processor ???

Thanks for the info

Theoretically it is, but it's not quite practical yet.

DonP · Post by **DonP** » Sat Nov 22, 2003 10:11 am

JEN wrote:Assuming I go for the Tualatin and undervolt it to 1.0VCore, what will the thermal power output be reduced to?

W = V^2 / R

Therefore if original voltage is Vo, undervolted is Vu and power at Vo is Wo then the power at undervolted is Wo.(Vu/Vo)^2.

So a 1.5V Tualatin generating 30W, being run at 1.0V (not saying it'll start at that voltage of course) should put out about 13W.

I think

DonP · Post by **DonP** » Sat Nov 22, 2003 10:14 am

JEN wrote:Is it possible to run this processor (socket 360 celeron 566MHz SL46T or SL3W7) with any standard socket 370 heatsink without the fan (passive cooled) ???

I've never tried it, sorry. Of course if it does have thermal problems maybe it'll be possible to undervolt it

Since W = V^2 / R and .. of forget it

JEN · Post by **JEN** » Thu Nov 27, 2003 9:24 am

Hi

Thanks for all the info

I know have a SL46T processor. Does anyone know which heatsink is the best for cooling it without a fan?

Will a stock amd xp heatsink rated at 2.0GHz be enough to cool the SL46T without a fan???

Any ideas or thoughts?

silvervarg · Post by **silvervarg** » Thu Nov 27, 2003 12:57 pm

Jen:
Will a stock amd xp heatsink rated at 2.0GHz be enough to cool the SL46T without a fan???

That is one though question to answer.
Unfortunately most heatsinks that can take high powered processors do the trick by using a high CFM fan (=very noisy). So by just looking at the heatsink rating you will not know much.
What you should look for is how the heatsink is designed and how well it will work with the airflow you will have in the box.

Do you intend to have any fans in the system?
If so, where would they be placed and how far do you like them to spinn?

ZL1 · Post by **ZL1** » Thu Nov 27, 2003 5:17 pm

dude say no to celerons (thats like a v6 camaro

)

D

Post by **MikeC** » Thu Nov 27, 2003 7:20 pm

Whether a HS can be used to cool a processor w/o a fan directly blowing or mounted on it depends on:

1) cooling effectiveness of the basic HS
2) open rather than closely spaced fins for good low airflow through it
3) cooling airflow or airflow potential around the CPU/cooler.

All passive cooling REALLY means is that there is no fan directly on it. In most systems, case vent fans -- especially the exhaust fan on the back panel -- create enough airflow around the CPU to make the idea of a "passive convection cooled" HS something of a misnomer. It's still cooled by airflow from a fan but the fan is not directly on it...

JEN · Post by **JEN** » Thu Nov 27, 2003 11:24 pm

Thanks for the info, I guess I will have to try it out and see what the temps are like

The case already has 2 fans in the PSU, both have the zalman fan controllers at there lowest. There is also 1 80mm fan on the P2 processor at half speed using a fan speed reduction cable. As the P2 processor runs much hotter than the SL46T, I was hoping to be able to get all the cooling done by using only the PSU fans.

How about this idea (please tell me if it has any chance of being successfull):

What if I made a 80mm side duct directly above the CPU+HS-fan and sealed all other openings in the case. This way the the air extracted by the PSU will be forced to pull air in through the 80mm duct potentially cooling the cooler/lowvoltage SL46T before extracting the air through the 2 slow speed fans in the PSU!

As I said above the PSU currently has 2 fans @ about 3v running a P2. It still managed to blow cool air from the exhaust. As the SL46T requires less voltage, the PSU should run cooler!

WHat do you think?

ZL1 · Post by **ZL1** » Fri Nov 28, 2003 9:17 am

JEN wrote:
What if I made a 80mm side duct directly above the CPU+HS-fan and sealed all other openings in the case. This way the the air extracted by the PSU will be forced to pull air in through the 80mm duct potentially cooling the cooler/lowvoltage SL46T before extracting the air through the 2 slow speed fans in the PSU!

As I said above the PSU currently has 2 fans @ about 3v running a P2. It still managed to blow cool air from the exhaust. As the SL46T requires less voltage, the PSU should run cooler!

WHat do you think?

iteresting project, if Im seeing it right
by the way you mean the fan on the bottom of the psu right ? you sure that one is sucking air in ? mine's blowing out

D

JEN · Post by **JEN** » Fri Nov 28, 2003 2:06 pm

There are 2 fans on my PSU, 1 at the bottom only visible when the case is open, and 1 at the back which can be seen from the back of the case. The fan at the bottom sucks air into the PSU and the 1 at the back blows air out of the PSU. I know it works this way because I modded it with 2 zalman fan controllers, and while it was open I made sure that the fans were like this!

ZL1 · Post by **ZL1** » Fri Nov 28, 2003 2:09 pm

JEN wrote:There are 2 fans on my PSU, 1 at the bottom only visible when the case is open, and 1 at the back which can be seen from the back of the case. The fan at the bottom sucks air into the PSU and the 1 at the back blows air out of the PSU. I know it works this way because I modded it with 2 zalman fan controllers, and while it was open I made sure that the fans were like this!

oh, but were they like this originally ?
my PSU also has 2 fans just like that, but I think they are both blowing air out

D

JEN · Post by **JEN** » Fri Nov 28, 2003 11:56 pm

Ever thought about turning that bottom fan around, you might get much better cooling!

Yes, the fans in my PSU were already like that!

ZL1 · Post by **ZL1** » Sat Nov 29, 2003 12:01 am

JEN wrote:Ever thought about turning that bottom fan around, you might get much better cooling!

Yes, the fans in my PSU were already like that!

well antec engineers usually know what they are doing

whats with the "!" at the end of each sentence ??

D

JEN · Post by **JEN** » Sat Nov 29, 2003 1:43 am

Bad habbit!

JEN · Post by **JEN** » Wed Dec 10, 2003 1:51 am

OK, I bought myself a M6VCF and the SL46T processor I mensioned above.

The problem I am having is that I am unable to tell what the CPU temperate is. After installing the manufacturer provided temperature monitor, the temp readings were 0!

I also installed MBM and VCool, but both also said that the temperate is 0!

whats going on?

ZL1 · Post by **ZL1** » Wed Dec 10, 2003 1:54 am

JEN wrote: whats going on?

Vega

Post by **Ralf Hutter** » Wed Dec 10, 2003 5:12 am

JEN wrote:OK, I bought myself a M6VCF and the SL46T processor I mensioned above.

The problem I am having is that I am unable to tell what the CPU temperate is. After installing the manufacturer provided temperature monitor, the temp readings were 0!

I also installed MBM and VCool, but both also said that the temperate is 0!

whats going on?

Your board may not have temp sensor on it. According to the MBM5 Biostar sensor chart at least a couple of those M6 series boards don't have sensors. Do any of those "Winbond" sensors show up in MBM? If not, your probably SOL. Biostar is a fairly low end brand anyway and if they're making OEMs for another company ("Vega") they probably left out even more features.

JEN · Post by **JEN** » Fri Dec 19, 2003 4:08 am

I have left my server on for a few days now. Why is the heatsink always cold. It doesnt seem to get worm ?

The stock fan in the heatsink is increably noisy. What can I do about this, because it vibrates like crazy. I cant tell what the temps are becuase this motherboard does not have any sensors

silvervarg · Post by **silvervarg** » Fri Dec 19, 2003 4:51 am

I guess the stock heatsink fan is either running a lot faster than it needs to or the thermal connection to the CPU is really bad so the heatsink does not heat up. Perhaps a bit of both.

My advice to you is to get an Arctic Cooling Copper Silent 2 TC (rev.2) cooler for Socket A. It should fit your board fine and it is a very good cooler that has a low price (<$20). Since the fan is thermally controlled depending on the heat on the heatsink is will never speed up a lot.
You can even try to disconnect the CPU fan and feel if the heatsink gets hot.
With this good heatsink on that slow processor you might even be able to run passive.

I will get that same HSF to cool a PIII 667MHz (socket 370) in January, so I might be able to give you more information on how it works out by then.

JEN · Post by **JEN** » Mon Dec 22, 2003 8:15 am

Please have a look at THIS picture.

I replaced the stock fan on the socket 370 heatsink rated upto 1200MHz cpus, and added this 92mm Zalman fan running at 12v (for now)!

Will this be enough to cool the already cool SL46T cpu ???

I cleaned and reapplied some silver thermal goop using some application instructions i found on the web.

Its now been running for harf an hour and the heatsink is cold to the touch!

This fan is a hell of a lot larger and much quieter than that tiny fan i was using before.

Will this work?

ZL1 · Post by **ZL1** » Mon Dec 22, 2003 11:04 am

JEN wrote:Please have a look at THIS picture.

I replaced the stock fan on the socket 370 heatsink rated upto 1200MHz cpus, and added this 92mm Zalman fan running at 12v (for now)!

Will this be enough to cool the already cool SL46T cpu ???

I cleaned and reapplied some silver thermal goop using some application instructions i found on the web.

Its now been running for harf an hour and the heatsink is cold to the touch!

This fan is a hell of a lot larger and much quieter than that tiny fan i was using before.

Will this work?

of course it should, but how did you install that fan ?

D

P.S. if you want to heat up the cpu to see how high it goes (meaning to see how well the cooler cools) use prime95

gksam · Post by **gksam** » Mon Dec 22, 2003 11:53 am

I had a Celeron 600 in my main machine at one point, and I ran it fanless for 2 years (just unplugged the fan). It didn't get very hot. I undervolted it to 1.4V (stock was 1.5V). I was just using the retail heatsink. The heatsink never got hot... just warm.

I am also running a P3 667 slot 1 fanless at 1.75V (stock is 1.65V, but for some reason this chip will not boot into XP consistently at 1.75V -- it will get stuck sometimes).

The P3 667 gets rather hot at 100% cpu usage (I think it was a pull from an HP system, so it had a decent heatsink on it) .. but it idles around 38oC.

JEN · Post by **JEN** » Mon Dec 22, 2003 12:45 pm

ZL1 wrote:...but how did you install that fan...

Like THIS.

Can you see how I did it ?