My Mobo monitor keeps telling me that my CPU temp is lower than my CPU hysteresis. What is The Cpu Hysteresis and what is a danagerous level. My computer runs about 40c and 45 under load. I am currently having troubles with my computer locking up and i was wondering if this is the problem. If this could be the problem what could i do to fix it.

It would depend on your CPU but an Athlon running in the 45 C range shouldn’t cause your computer to lock up. That’s a pretty normal temp for an Athlon under load.

What CPU are you refering to? It makes a big difference.

xp1800+ with 256 ddr ram
kg7-raid mother board

That is a normal temp for that CPU. The temp is not the cause of your locking up.

PS

I was following your other thread and was trying to download your MOBO manual from Abit but it keeps timing out. They must be having trouble with their server or I’m having trouble with my ISP.

Yeah i appreciate it... I have been try for the last week to get this computer to run stable. I have replaced my psu. reinstalled windows xp ( which was a bi**h cause it wanted to lock up every time it had to work under a load )!! I am getting kinda of frustrated with this!! all i want to do is get it to play my game with out locking up. What is weird is that the game runs great with out any jumps or pauses and then just lockes up to were i have to hit the reset button.. Any suggestions would be appreciated alot!! I overclock it a little and it made it a little father in to the game before it locked up. I am using a geforce 2 mx 400 video card that i have hated from the day i got it. I am wondering if it could be the problem??? And i also am still wondering what "hysteresis" means??? thanks in advance WESLEY

I knew what “hysteresis” was when I took undergrad physics 30 years ago. Certain objects become magnetic they enter a magnetic field. By altering the magnetic field in the other direction (North to South for instance), you can demagnetize them. This is how degaussing coils work.

I believe (and anyone correct me if I’m wrong) that “CPU hysteresis temperature” represents that temp where the conductive elements of an IC chip can start to migrate through the nonconductive elements. This altered configuration then would be a circuit board with a bunch of short circuits. Not good.

Getting back to your computer, do you have another display adapter that you can try?

No i don't have a spare video... I am think of getting a new one anyways...what is a good one that does not seem to cause problems alot. Has anyone heard of any thing else that could cause this before i go and spend money on something that i am not sure is the problem... Thanks Wesley

You say you changed the PSU, what wattage is it? That system would need a quite hefty supply to stop it from crashing. I ran an Athlon 700 with 200watt and it crashed, just as yours was doing, and as soon as I put it up to 300watt it is running just fine. Try a 350watt or 300watt in it. Also you have updated the drivers etc....

Good luck

David

I upgraded it to a 400w psu. And yes i have updated all the drivers that i could find. I pretty much have narrowed it down to a hardware conflict some where. I started with a 300w and then bought a new 400w that amd suggested for this processor. Thanks for the help... wesley

I am having the exact same issues, with the same motherboard and processor combo...

Did you ever get your comptuer fixed? if so please tell me what you did.

I had the same problems with my ABIT/AMD 1.2GHz combo until I changed the Memeory Speed settings from 8/10ns to Normal. Since doing this, it hasn't crashed once. I supposedly have fast SDRAM, but if I don't put it to Normal in the BIOS, my p.c crashes.

Hysteresis in simple terms is a phase transition
which is related to heat and resistance, and the
flow of electrons. It has a magnetic component
also. Related to CPUs... the hysteresis temp of
a processor is the point at which cross talk
occurs and data can become corrupt, or unreliable.
In other words the system can and probably will
become unstabe at or above the hysteresis temp
for a particular processor. This temp varies
quite a bit from one to another. On the older
AMD K6 units... it was only 112deg F or 44deg C.
For the newer Athlons it is much higher. Maybe
you have a disk cache problem? Try the freeware
program cacheman, and see if this helps.

I have had similar problems, and although
my mobo is an MSI, my particular problem
related to the ddr memory I had installed.
It was generic and it was the cause of my
problems. I kept using it until finally
XP wouldn't even boot--then I downloaded a
memory diagnostic tool that can be run from
a floppy disk and it told me that that the
first 128MB was fine, but the second (I had
256) was dust. I bought and installed some
ddr 333 and everything has been fine since.