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PIII 700E dB0 Stepping

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Jefferson_One

Registered
Joined
Jun 23, 2001
This chip seems to run hot ... around 50C all the time. I have a peltier element on there: checked the fan, heat-sink compound, sealed around CPU core, cold-side verified, etc ... and the temp is still at 50C+.

What's the deal? I went out and bought a PIII stock HSF: the temperature still was 50C. An AnalogX program tells me my CPU load is 0%, yet I can run 3DMark2001 and the temperature never changes much.

I can overclock this 700E to 800Mhz+, but probably not more than 850 or so. What do you think? Is 50C too high for this chip? What does the dB0 stepping mean?

Thanks -

Jeff
 

Slake

Senior Member
Joined
Jan 12, 2001
Location
Knoxville,Tn
Jefferson_One (Jul 01, 2001 01:55 a.m.):
This chip seems to run hot ... around 50C all the time. I have a peltier element on there: checked the fan, heat-sink compound, sealed around CPU core, cold-side verified, etc ... and the temp is still at 50C+.

What's the deal? I went out and bought a PIII stock HSF: the temperature still was 50C. An AnalogX program tells me my CPU load is 0%, yet I can run 3DMark2001 and the temperature never changes much.

I can overclock this 700E to 800Mhz+, but probably not more than 850 or so. What do you think? Is 50C too high for this chip? What does the dB0 stepping mean?

Thanks -
Jeff

Unless this is a brand spanking new stepping there is no dB0 Pentium III. None is listed in Intels S-specs. The onl dB0's I could find were Pentium II.
Regardless of that, those temps are high. I suspect your reading is inaaccurate beacuse you get 50C regardless of CPU load state. Here is an article http://www.overclockers.com/tips443/ by Hoot that may help.I will find post a link to another article that details how to install a mod that guarantees accurate measurements. My P3 700E cB0 SL3XX runs 31-32C idle and 40-41C load @ 889MHz and I consider my temps too high. You didn't mention what case cooling you have. I know zip about peltiers. Good luck and good to see you here.
 
OP
J

Jefferson_One

Registered
Joined
Jun 23, 2001
Hi Slake -

I got the "dB0" number from 'CPU Info Version 2.00'. It says:
Processor: Intel Pentium III
Revision: dB0 (Coppermine)
Family: 6
Model: 8
Stepping: 3

Also checked with Sandra:
Rating: PR962 Slot1
Speed/FSB: 933Mhz/133Mhz
Revision/Stepping: 8/3
Stepping Mask: cB0CPU Temp: 31C

It runs stable at 800 @ 1.65V. As far as case cooling, I have an ATX with one front intake, PS out, & a 3DCool slot-fan out. I have 1 AGP card, PCI sound card, & PCI NIC card - that's it. The gForce is not overclocked, so with that, there is not a lot of other devices to add to the heat. Case side open; case temp ~ 28C.

I checked the peltier ... it seems good. One thing though, the element is rather large in comparison to the CPU core: I guess that is normal? I insulated around the core as best I could, with no effect on temps. Here is a pic of the peltier from a-pro.com:


Basically, you just couple it to the CPU and that's it - plug it in. I am baffled. What do you make of the revision/stepping numbers?

Jeff
 

engjohn

Senior Member
Joined
Dec 18, 2000
Location
SoCal
You have a cB0 chip,

Also I would ditch that pelt setup you have and invest in a good ALPHA p3125 HSF or the like.

You need to run a heatspreader with a peltier and there is not enough room with that combo you have. Also, when using a pelt you need REALLY GOOD cooling on the hot side of the pelt(this unit you have does not look up to the task). If you do not cool the hot side of the pelt well, it can result in HIGHER temps than with a good HSF alone.

If your temps do not change between full load and idle, I would say that you are monitoring the wrong sensor.
 

Slake

Senior Member
Joined
Jan 12, 2001
Location
Knoxville,Tn
I'd believe Sandra on the stepping. As far as the cpu temp, Sandra looks more believable also. BUT Sandra reported my CPU temp as 15C...LOL I wish!