What is the max safe temps for a P4??
I got folding@home recently and running it for a few hours now. Two instances to take 100% of a hyper threading processor. Temperatures have risen higher than I've ever seen it go... Right now it's at 55/131 degrees (C/F). :wow2: (New personal record.) I have stock coolong. How high should I let it go before I start worrying about it? Should I look into extra cooling? How much does a good HSF cost? Can anyone post some links to some good ones? So many questions... 
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ThermalRight hands down.
The P4 has clock throttling thermal protection; if it overheats, it will dynamically underclock itself to avoid cooking; if it can't underclock enough, it will shut off.
http://processorfinder.intel.com/scripts/list.asp?ProcFam=483&NoNav=NO&CorSpd=5467&SysBusSpd=6107&MfgTech=ALL&step=ALL&cache=ALL&PkgType=ALL&btnFOS=Filter+on+selections
The P4 2.8-C is safe to 72-75*C, depending on the stepping. 55*C is high, but not really unacceptable...
Is your stated 55 at default processor speed?
for example, abit has acknowledged that the IS7 (what im using) reports temps 10-15 degrees higher than what any other P4 board would (because they're stupid). so when mine says 60C it reall means 45-50C, which as far as im concerned is fine with my SLK-900. i could use some AS5 though...
btw, intel says that <75 is perfectly alright
That's probably correct, if...if the computer is at bone stock settings, idling - no demands at all on the processor.
My CPU (P4 Northwood) runs stablest (yes, most stable) at 49-59 C for CPU, that is 24 C average over case. It is NOT throttling at all in that range. RAM, OTOH, does not like being at 50+ C. The P4 has produced almost 3\4 of my total two box points, as versus a Barton 2500+ which is running in the 40's in C temp measurements.
NOTE, If I get the P4 above 63 C the OTES gets too hot as it is being heated by hot air from CPU-- on an IC7-Max3 board. OTES does not like to be above 49 C, and the OTES fan is running at 100% capacity at 47 C and up. But, it is not the P4 CPU itself that stumbles first, it is RAM and the OTES, given pure temp readings.
What is more likely to happen than the P4 itself dying is for things around it to get overheated. The P4 CPU series, with long processing pipes compared to AMD's chips and larger L2 and in some cases L3 case on-die, was designed to be hugely heat tolerant compared to the Barton CPU.
The nice metal capping plate on the P4 series spread heat away from the center of the die, thus the center gets heat radiated in plate out from center and the center, with a good HSF assembly (HS+F) does not get relatively hyper-hot compared to the rest of the die. THAT ONE THING (metal cap plate on P4), down here in Florida, lets me OC the P4 one heck of a lot more than the Barton with maximized flow Air Cooling given ambient room temps that can often be in the high 20's C to low 30's C in summer. The heat tolerance of core, is more like and Opteron core, which also has a metal radiating cap plate on the die. AMD is back to using metal capping plates with Opteron, which they used on the K6-2 and K6-3 series even-- VERY GOOD IDEA. They act like heat load deconcentrators, or spreaders.
Oh, the P4 has a flower style HSF on it, copper plate with aluminum pins. Thing was a PITA to mount, but works fine. It is at link below:
http://www.svc.com/mcx478v.html although I do not think I got it at SVC.
John D.
What is 'OTES'?
That is one BIG reason the IC7-Max3 ran $192.00 at ZipZoomFly and close to that at NewEgg yesterday when I looked. Demand is outstripping supply and price is going UP in last week.
John D.
either way though, keep in mind that this is all in texas in a small dorm room where the a/c doesn't work very well (about 80F at all times)
The Winbond parsing for CPU temps was high on my Abit IC7-Max3 until latest BIOS flash, ditto my MSI board. Given that my P4 DOES run at about 24 C over case temp, what is the case temp???? Have you logged that stuff in MBM 5.0 previously??? If so, would like to see highs and lows and average, for case and CPU sensing.
John D.-- who lives where it is often as warm plus frequently DAMPISH on top of that (Florida, well down the peninsula on west coast side, South of Tampa by about 175 miles.).
also i dont have logs, but i've been only using MBM (without winbond or abit eq installed).
cpu temps average at load are 60, when it was ice cold outside (read below freezing) temps reached as low as 51-52. case temp essentially never wavers from 43, of course this changed when it was cold. thats with 2 80mm intake fans and 1 80mm exhaust fan plus the airflow through a 430w antec truepower, all in an aluminum lian-li pc-7.
OK, in this case, would lower case temps to the 30's as far as C range. In my case, about 180-190 CFM of air is flowing through my P4 case, 4 case fans at 40 CFM each, PSU has two fans on it, OTES fan is running close to full steam at higher temps. Also, the CPU HS fan is a 42 -43 CFM fan.
Let's see, 43 plus 24 is 67 C??? So, 35 C plus 24 C is 59 C which is where I know my P4 is still in its comfort range with a gereat deal of safety margin -- try for low to mid thirties in C for ideal case temp range.
Actually, my case averages about 32-34 C high end now. Had it to 36 C twice, added more fanning to case, runs about 33 C now high end-- yeah, said it again to emphasize case temp effect on CPU temp with P4's.
John D.
about the case temps, having the door off lowers them by at most 1 or 2 degrees. i'm under no circumstances adding another fan, thats unreasonable for noise
OC 2.8 to 3.5, 100% CPU utilization, ambient temp about 22*C:
- CPU ~52*C indicated
- Case temp 29*C
I'm inclined to think that the CPU temp is close to accurate. The case temp seems rather high though, as this is a very spacious aluminum case with excellent airflow, included a 120mm as exhaust. Oh well; it's stable so I'm not going to fret about the temps.