system hotter than cpu

I dropped 2 degrees f by having the case removed on back side of MB. the
other side left on with a fan attached and blowing out. tends to suck the
cooler air in and around better that way I guess.

--
Dave M
Radeon 9800Pro 256mb
P4 2.8 oc to 3.1


"Roger M" wrote in message
...


EzAk wrote:

i have 3 case fans blowing in (one in front bottom 2 in back and the
case side off with these temps

My system and cpu temperature was hotter with the side off. My system
and cpu temperature was hotter with the fans blowing in instead of out.
My coolest temp was achieved with all cooling fans pulling hot air out
of the case. My core voltage is set at 1.9V and my fsb is set at 212 and
my idle temp on the cpu is 47C with fully loaded usually going to 56 or
so.




Roger





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"BigBadger" wrote in message
...
But the air coming off the heatsink cannot be hotter than the cpu
(otherwise
it would heat the cpu not cool it).
The cpu must always be hotter than the case air temp (unless your water or
Refrigeration cooling or such like)

Listen to the Badger. In an air-cooled system the cpu is always going to be
hotter than the air around it.

This appears to be a situation where the case and system temps are reversed.
46C is about right for the cpu. 38C is a little high for the case, but it's
not unheard of.

I'd suggest going into the bios (hold down the delete key on reboot,) and
check the readings in the PC Health section. They should tell you the real
story.

P.S., MotherBoard Monitor 5 is free and a much more sophisticated app than
Hardware Doctor. It's easy to set up if you use the motherboard list at
http://mbm.livewiredev.com/

EzAk wrote:

ok whats the deal he

bios stats
system temp: 46c/114f
cpu surface temp: 38c/100f
cpu core temp: 42c/107f

hardware doctor
system 46
cpu 38.00 - 38.50

system is:
Zalman cnps 7000A-Cu *copper*
Barton 2500+ WEEK 33 (unlocked)
3200 ddr 400 512
ATI 9800 PRO 128mb
60gb Maxtor
160gb Maxtor
Plexwriter (12X1032) AND (52X32X52)
NSpire 300w
Chen Ming ATX-601 AE case


I'd close your case, but first reverse your rear fans both to exhaust and
leave front as an intake, may get some air movement in your case and you
may get better case temp readings. Either way with 3 fans running as long
as some are exhausting your case temps would not be that high or anything
to worry about. As others have pointed out fualty temp readings or a heat
source close to your board sensor could also cause this reading.

changed both back fans to out front to in and side on temps change but
no diffrents the case is still hotter than the cpu. I had this same
setup with a valcano 9 and didnt have this problem. Is it posible that
my cooler for the cpu is cooling the cpu and forcing the heat from the
cpu into the case which is why the case is hotter than the cpu? i know
its far feched but i dont know what else i could be.

A long time ago in a galaxy far, far away, EzAk
wrote:

changed both back fans to out front to in and side on temps change but
no diffrents the case is still hotter than the cpu. I had this same
setup with a valcano 9 and didnt have this problem. Is it posible that
my cooler for the cpu is cooling the cpu and forcing the heat from the
cpu into the case which is why the case is hotter than the cpu? i know
its far feched but i dont know what else i could be.

Have you tried taking a reading with the case open? Leave the case open for a
few minutes, then see if the temperature decreases to normal. If not, the
temp meter might be reporting the wrong temp for one reason or another. Also
physically check with your hand whether the case feels abnormally warm or
not.

Only other thing I can think of, is the power supply blowing hot air in by
any chance? Do you have alot of drives installed?

I've been trying to follow discussions about this subject because the
same is happening to my pc. On idle it's at 39C CPU and 48C or above
PWM temp. On full load the system temp. is still 10 degrees (or
more) hotter than the CPU. I've been building PC's for a few years now
and this is the first I've seen something like this. If I leave it
running like this with the sys. temp +10 hotter than the CPU, will
there be any damage? It is stable using prime 95 and SiS. Here's my
rig:

Abit KV-7
AMD Athlon XP 1800 T-bred @ 2.31 GHz (JIUHB-DLT3C) 1.75 Volts
11.5 X 197 FSB
512 mb Corsair PC 3200
Asus TD 9520 Vid Card
Creative SB Live 5.1
80 GB Maxtor HD
52X CD-Rom

On Thu, 18 Dec 2003 17:46:29 -0500, EzAk
wrote:

changed both back fans to out front to in and side on temps change but
no diffrents the case is still hotter than the cpu. I had this same
setup with a valcano 9 and didnt have this problem. Is it posible that
my cooler for the cpu is cooling the cpu and forcing the heat from the
cpu into the case which is why the case is hotter than the cpu? i know
its far feched but i dont know what else i could be.

"joef" wrote in message
...

"ElJerid" wrote in message
...

"EzAk" wrote in message
...
ok whats the deal he

bios stats
system temp: 46c/114f
cpu surface temp: 38c/100f
cpu core temp: 42c/107f

hardware doctor
system 46
cpu 38.00 - 38.50

system is:
Zalman cnps 7000A-Cu *copper*
Barton 2500+ WEEK 33 (unlocked)
3200 ddr 400 512
ATI 9800 PRO 128mb
60gb Maxtor
160gb Maxtor
Plexwriter (12X1032) AND (52X32X52)
NSpire 300w
Chen Ming ATX-601 AE case

There is a problem with your case ventilation. Are there any fans in it?
The two hard disks plus the 9800 Pro dissipate a lot of heat that has to
be
extracted. You should have one or two fans blowing into the case and one
on
top of the psu fan(s) extracting the hot air from the case.

My sysoft sandra confuses the system and cpu readings - ie they're
swapped.
Could be your problem. Does the system temp rise quickly from cold? This
might indicate same thing happening.

This *is* the problem. It is against the laws of Physics for the system
temp to be higher than the CPU temp. (Unless he's using a pelt, or has a
heater in the case.... which I doubt somehow.)

Chip.

"baskitcaise" wrote in message
...
EzAk wrote:

running no overclocking right now. mobo is ABIT AT7 MAX2 with latest
bios update. not sure where the termistate on this board is ill have to
try to locate it tomarrow when i have some light. thanks for all your
help. Is there a diffrent program i can use to see if the temps are
reversed?

Looking at the specs of this board it appears that the sys temp sensor is
between the cpu and the northbridge, I wonder if it is picking up the hot
air
from the cpu fan?

Yes it does. But its still *impossible* for the system temp to be higher
than the CPU temp. (Assuming he's not using a peltier or similar, and
assuming he doesn't have a heater in the case.)

How can hot CPU blow hot air onto something else and make it *hotter*. Its
impossible.

The explanation is, he has his sensors the wrong way around.

Chip.


--
Mark
Twixt hill and high water.
N.Wales, UK.
Email is spam trap try baskitcaise at gmx dot co dot uk

That's a pretty good overclock. What stepping 2100+ do you have? Also, how
about on rainy or foggy days? Are you concerned with humidity?

Dave

"§unnyß©" wrote in message
...
On Sat, 20 Dec 2003 10:21:36 -0000, "Chip"
wrote:

My system temp is usually higher than my CPU temp.
AMD 2100+ "B" at 2350Mhz (173.9x13.5)
1.85 vcore
CPU temp is 19c / System temp is 20c
At 6:00 AM this morning the CPU temp was 15c / System 19c

The box is closed but I have a cold air plenum feeding outside air almost
directly to the CPU fan. The other two intake fans are room air.

30 degree F air directly onto the CPU fan keeps it reeeeaaal cool.


§ß©

On Sat, 20 Dec 2003 10:21:36 +0000, Chip wrote:

This *is* the problem. It is against the laws of Physics for the system
temp to be higher than the CPU temp. (Unless he's using a pelt, or has a
heater in the case.... which I doubt somehow.)

Actually, some boards have the system sensor where it can be hotter than
the CPU sensor. The ASrock K7S8X series is one such board. I think the
system sensor is actually on the northbridge although I didn't check for
sure. At idle, running Athcool, the cpu temp is about 1-2C lower than the
reported system temp. Under load that changes of course with the cpu temp
going 10C over system temp. But I would agree with you if the system had
an open sensor not close to something hot.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
http://mysite.verizon.net/res0exft/cpu.html