Maximum Die Temp For Celeron 400A Slot 1

[MetaDFF]

Does anybody remember what is the maximum die temperature for a Slot 1 Celeron 400A?

I'm thinking of building an IPCOP box out of some old parts, and would prefer if it were completely fanless.

The processor is a Slot 1 SEPP package Celeron (23.7 W TDP, Vcore = 2 V).

The only thing mounted on the processor is the original HSF (40 mm fan).

I think it should be possible to run it the CPU fanless.
I could always try undervolting the chip...

Edit: n/m I found what I was looking for. Google is your friend
Intel Processor Finder says 85C.

 

[Mondoman]

Of course, measuring the die temp is probably the tricky part -- did those CPUs have built-in thermal diodes?

 

[MetaDFF]

I don't think there is a temperature sensor on the actual CPU die.

The only temperature sensor on the Abit BH6 that I'm using is the LM79 sensor which gives the motherboard/chassis temperature.

I did manage to undervolt the chip down to 1.6 V from the default 2.0 V which should reduce the TDP to 15.4 W.

Running from 1.6 V w. the fan unplugged on an open table under full load, I can feel the heat rising from the heat sink. It's not hot, but warm.

 

[sjwaste]

Oh man, the BH6. That thing ran my 300A @ 450 for a few years. Memories.

It would be tricky since, IIRC, the cache is on the PCB and not on die, hence the SECC package, but you might be able to rig up a newer tower-style heatsink to fit and cut the old heatsink to remain on the cache chips? That'd definitely be ok running fanless.

 

[MetaDFF]

The Celeron is the same as this one from wiki.

I believe the L2 is inside the die. The stock heat sink that I'm using only contacts the core and not the PCB on the side (the heatsink is at least 2 mm away from the actual PCB) (SEPP Heatsink)

Maybe it's better to just 7 volt mod the stock fan so it runs quieter and just settle for that...

 

[Foxery]

Taking the fan off any product that comes with one is not going to end well for you

Also, chips that old are NOT smart enough to underclock or turn off when they're in danger. That was a new feature starting with the Pentium 4. It will just sit there and fry.

 

[Arcanedeath]

Actually the P4 was the first intel desktop chip to throttle instead of just shutting off the P3 coppermines were the first intel desktop chips w/ thermal protection and would shut off the system if they overheated but that old celery didn't have either of those features it was based on the older p2's / first p3's w/out ondie thermal diode's