Possible voltage issue? or classic overheat?

[The Faceless Rebel]

Just a quick question. If you are undervolting, is it possible for the problem to not manifest itself for some time? I'm curious because I'm having spurious lockup problems after several minutes of severe CPU stress, but it's unlikely to be an overheat problem because I'm running an ALPHA PEP66t with the Delta 38cfm fan on a little old Celeron. I've reapplied the Arctic Silver II 3 times now, and I'm pretty sure I got the core nicely covered. So these lockups are starting to....ummm....**** ME OFF!!!! :(

I've clocked all the way down to 850mhz, which means a regular 66mhz/33mhz AGP/PCI bus clocking so I feel it is unlikely to be caused by a bad component. Yet it seems absurd that I could possibly be overheating this here little Celly@850, running an ALPHA! ARGH!!

If you have any ideas, please assist. Thanks!

[outhouse]

I think CV will let you know rite now if it is not enough, under load is when you will notice a lack of CV as well as overheating issues It sure would be nice if you had a temp sensor instead of guessing also no matter what kind of fan or HS you have if your ambient temp is high your cpu will also be high the only way top know for sure is to know your temps, I think most guys that have done a great job of overclocking such as yourself usualy have a way to check temp's. The weather got cold where I live and I ran out of propane and it got cold in my house guess what I got to raise my fsb by 3 now that its warm had to lower it back down to play games.

[batboy]

Tim's method of checking whether it's a heat related problem is as follows:

Take the case off (or side panel) and point an AC fan on high speed at it's innards. That should tell you if it's a heat problem or not.

[The Faceless Rebel]

Hmm, I have determined by Prime95 that it is definitely a CPU overheat problem.

DAMMIT!! :(

I have already maxed out my aircooling setup. So I guess the next step is to try to lap my CPU and heatsink, maybe increase the amount of heat being transferred from core to HSF. What do you guys think? Thanks. :)

[Kryten]

The Faceless Rebel (Apr 16, 2001 07:39 p.m.):
Hmm, I have determined by Prime95 that it is definitely a CPU overheat problem.

DAMMIT!! :(

I have already maxed out my aircooling setup. So I guess the next step is to try to lap my CPU and heatsink, maybe increase the amount of heat being transferred from core to HSF. What do you guys think? Thanks. :)

hmmm... sound like strip it and turn it back a quarter turn to me..
have you cooked the CPU and now looking to try fix it by throwing cool air and lowering voltages at it?
Just guessing I may be totally wrong.

[William]

The Faceless Rebel (Apr 16, 2001 07:39 p.m.):
Hmm, I have determined by Prime95 that it is definitely a CPU overheat problem.

DAMMIT!! :(

I have already maxed out my aircooling setup. So I guess the next step is to try to lap my CPU and heatsink, maybe increase the amount of heat being transferred from core to HSF. What do you guys think? Thanks. :)

don't lap the cpu, just your hsf!! :) Hmm, water cooling ought to sound very seductive now to you. You using AS II?

[The Faceless Rebel]

Yah, I'm using the Arctic Silver II...

Umm, when you "cook" your CPU it generally stops working, right? Well it works just fine, thank you very much. It's not cooked. It just overheats and crashes when I put a heavy stress on it. I've dropped the voltage all the way down to 1.7V, which is the lowest I can make it and not crash on startup. I can't possibly imagine a scenario in which a Celeron at any speed could generate enough heat to crash when being cooled by an ALPHA...

Water cooling is kind of hard, isn't it? I'll try lapping the HS first...see how that turns out. :)

[Mr B]

This sounds to me like the hsf might not be sitting flush against the cpu die. Check the clip on the hsf...these have been known to get bent and do this....

Mr B

[The Faceless Rebel]

Hmm...I've checked the HSF...looks like a pretty tight fit to me...

sigh....i'm out of ideas. i guess all thats left is lapping...

[LutaWicasa]

What are ya gettin' out of Prime?? Is it tellin' ya hardware or some error(round-off etc)?
Oh, and by the way my Celly would tend to get really flakey when the temps were up to (as low as) 41c. With mine I can't let'er get as far as 40c. I do whatever to keep the temp below that. Like right now I have 3 120mm, 2 80mm, 1 60mm and 1 house fan blowin' on this Lil' darlin'. :)

[The Faceless Rebel]

The error is:

ERROR: SUM(INPUTS) != (SUMOUTPUTS), and two really huge numbers that are not the same.

Then it goes "Possible hardware failure" and then sends me off to read the readme file, which just says that my computer sucks and I shouldn't try to do anything useful with it. OK, not exactly, but that might as well be what it says because I'm now locking up games with this computer.

Is it possible my Celeron is dying, and this crap means it's on it's last legs? I ask merely for information...cuz it takes time to order a new one and I would like to know before it kicks the bucket completely ;)

[LutaWicasa]

Are ya still stable at 952? If ya got no probs until yer upwards of 995 it may simply be ya've reached as far as that chip'll go. Gotta kinda wonder if ya got some ram flake out on ya. Any possibility yer PSU could be going?

[bdf24]

Well I'm not running a Celeron but, My PIII 800 @1000mhz will will lockup in games or not even load them and kick me back to the desktop if my cpu temps go above 29c! This is with my CVoltage maxed out. I believe if I could get more volts to the cpu it this wouldnt happen but no can do!

Thats why I'm going to water cooling. To get the temps to stay in the single digits! To obtain maximum stability. As well as give me something new to play around with! hehehehe!

[Kryten]

Have you tried running the system at default CPU settings and if so is it doing it then?

[The Faceless Rebel]

Well...
I dropped the thing all the way back to 850mhz (100fsb) and it takes longer but still crashes under stresses. I've yet to try falling all the way back to the rated clock (566) since my mobo is BX and requires me to change a jumper on the board to set the AGP bus to 1:1 as opposed to 2:3 where it is now. Unfortunately, the jumper is rather inconveniently located next to the RAM and AGP slots and as such I have to take out the vidcard and the #3 DIMM to change it. Needless to say, a pain in the ass.

I'll try the running at 566 thing tomorrow.