shutting down at 45 C

[SKTR2477]

My system seems to be shutting down at 45 C.

MB: NF7-S v2
CPU: Athlon XP 2400-M
RAM: 2x 256 Buffalo PC-3200

I've tried different BIOS settings for shutdown temps.

I've tried running default settings, except for voltage just to run the temps up to 45. Still shuts down.

Any ideas?
New Bios?


Thanks,
Brian

[SKTR2477]

cpu temp = 45 C
Sorry forgot to specify that.

[Gizmo]

Hmmm, 45C is usually the norm while running, weird that it shuts down at that temp. I'm not gonna suggest anything, since there's cleverer people around than myself . But what I was gonna say is that it could be a bad motherboard, as for the bios, yeah, equalling down to the motherboard, it could just be a bad motherboard. But otherwise I'd wait for other peoples analysis for this one.

[Tin]

remove your heatsink and check to see if you chipped the core while installing it last time. a chipped core will on my old desktop 2500+ gave me the exact same problem.

[SKTR2477]

Well, re-installed the processor (no chips) and heatsink, and it seems to be fixed. Ran Prime95 overnight, no problems. It's also running about 5 C cooler.

Must have messed something up the first time, but I really have no idea what. The only thing I can think of is the thermal paste. The first time I barely used any, I'm wondering if maybe a gap between the HS and processor could have caused it?

Thanks.

[Vigo]

Maybe you were exceeding the mobo threshold? How hot does that get and whats the threshold set at?

Default for pc probe for my motherboard (asus) was set at 45 degrees celcius. With the problems I've been having it idles near 40.

[SKTR2477]

After doing a bit more research I've come up w/ the following:
Let me know if this sounds right.

There is a cpu internal temp diode that is different than the cpu temp displayed by the MB. The internal cpu temp is the one that triggers the shut down, not the MB CPU temp. If the heatsink isn't set properly there could be significant difference in these temps. What I'm guessing is that the internal cpu temp was hitting the limit and the MB cpu temp that was being displayed was only 45. This assumes that my heatsink wasn't set properly.

fyi...
Sys temps were under 30C.

[Hags]

Um, well ure rite about one thing, ure AMD CPU has an internal sensor diode, however the cpu's from AMD do not shut themselves down unlike Intel. AMD relies on the motherboard to shut the CPU down at dangerous temps, Intel is currently the only one that has the technology contained in the CPU to shut itself down without relying on the motherboard

[Force Flow]

Most likely the shutdown temp in the BIOS is set to 45'C. If it is, bump it up to 60'C.

[SKTR2477]

shutdown temp was/is set to 65

[SKTR2477]

Ok, it is the MB that shuts the system down, but it's based off the internal cpu diode temp, not the socket temp, the problem being that it's the socket temp that's being displayed.
At least according to some threads at the Abit forum.

http://forum.abit-usa.com/showthread.php?threadid=40230

http://forum.abit-usa.com/showthread.php?threadid=26971

Anyway, the problem seems to be fixed. Thanks.