CPU overheating

Status
This thread has been Locked and is not open to further replies. Please start a New Thread if you're having a similar issue. View our Welcome Guide to learn how to use this site.

stevecook

Thread Starter
Joined
Oct 8, 2005
Messages
462
I've just cleaned up and reapplied thermal paste to CPU and heatsink but according to Speedfan the CPU is idling at 72 degrees and shoots up to 105 very quickly under load, any ideas as to cause?
I've cleaned the heatsink etc and the fan is running at 3800 rpm, is it time to replace the processor?
 
Joined
Apr 2, 2002
Messages
3,437
I'd say either the heatsink is not clamped down securely and making good contact, or the heatsink paste is applied incorrectly.
 

stevecook

Thread Starter
Joined
Oct 8, 2005
Messages
462
Double checked clamps and even spread of paste - still running 75 degrees.
Checked in BIOS target temp for CPU was 75 degrees so I changed it to 60 which is the lowest setting but I still think 60 is too hot for idling. The computer is Packad Bell with Intel P5 processor and is now idling at 62 degrees.
 
Joined
Apr 2, 2002
Messages
3,437
I wouldn't recommend "spreading" the paste.

Use a quality thermal paste like Arctic Silver 5 and apply a dab the size of half a grain of rice. Allow the pressure of the heatsink clamp and eventual heating to evenly spread the paste.

Cooling results should be immediate, with improved temps in a few days (usually 3-4 C) factoring in pate curing and spreading.
 

stevecook

Thread Starter
Joined
Oct 8, 2005
Messages
462
The paste I have is "Coolermaster Thermal Paste" is spread thinly and should be OK - I've done dozens of these before, I'm just not accustomed to the idling temp being so high.
If what I saw in the BIOS is correct then NEC (NEC mobo) seem to think 60 degrees is normal!!
 

weddy69

Banned
Joined
Jan 11, 2013
Messages
14
I dont think your having much of an issue, 105 for temp is not that bad. If it was more like 150+ i would start to really wonder. Review this Link and see what you think.

What was the past temp before you replaced the paste?
 

stevecook

Thread Starter
Joined
Oct 8, 2005
Messages
462
Yes Prunejuice, both Speedfan and HWMonitor are showing the same temps while Windows is idling.
weddy69 those temps are why I cleaned the heatsink and repasted the CPU, so no change!
 
Joined
Apr 2, 2002
Messages
3,437
Assuming you're using the stock Intel heatsink, I would remove it, remove the processor, clean it up, replace it with fresh thermal paste and re-attach the heatsink making sure the push-pins fully lock in.

Couldn't hurt. I doubt there's anything wrong with the actual processor itself.
 

crjdriver

Moderator
Joined
Jan 2, 2001
Messages
40,799
Did you pull the mb to R&R the hsf? If not, there is a good chance you do not have one [or more] of the push-pins fully seated. The hsf must contact the cpu with a min of 15lb clamping force. Less than that value and the cpu will overheat.

I always recommend pulling the board to do a hsf on an intel cpu. AMDs are pretty easy to do in the case [in fact almost foolproof] however intels can be a pain.
 

stevecook

Thread Starter
Joined
Oct 8, 2005
Messages
462
Just spent 15mins in BIOS - the target CPU temp in there can be set to figures between 60c and 90c - it was originally set to 75c, so I changed it to 60c and this caused the idling temp to drop to 62c in Windows. CPU temp is showing 82c in the BIOS without Windows running!
Confused by these temps I set BIOS to defaults and the CPU target temp went back to 75c!!
The heatsink and carrier are AVC and I can't see anything amiss there, but these BIOS settings look like it's supposed to run so hot!
 

Triple6

Moderator
Joined
Dec 26, 2002
Messages
52,930
First Name
Rob
I dont think your having much of an issue, 105 for temp is not that bad. If it was more like 150+ i would start to really wonder. Review this Link and see what you think.

What was the past temp before you replaced the paste?
Please do not post incorrect and dangerous info. The temps you say are not bad are beyond the maximum temps for pretty much any processor. Your own link even disputes what you say.
 

stevecook

Thread Starter
Joined
Oct 8, 2005
Messages
462
Intel P4 3.40Ghz; Asus mobo P5S800-VM/S.

The PC is Packard Bell and the mobo shows as NEC in PCWizard and HWMonitor
XP Home
 

weddy69

Banned
Joined
Jan 11, 2013
Messages
14
@Triples Did you do any of the conversion or didnt they teach you that in the tech school. 48C to F? 118 Degrees on over clocked processor under load... so how is my comment false? Im not hear to bash anyone it was just a comment based not knowing the processor type, prior heats, over clocking if done. etc so really 105F is not bad.. could use adjusting but not bad under load. You should assume everyone knows what you mean when your saying Degrees be specific F or C I used F.

ok here is your spec sheet see page 69 if your falling in the required zones. AGAIN THEY ARE IN Celsius.

Intel P4 3.40Ghz spec sheet for thermal... pg 69.
 
Status
This thread has been Locked and is not open to further replies. Please start a New Thread if you're having a similar issue. View our Welcome Guide to learn how to use this site.

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

As Seen On
As Seen On...

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

Join over 807,865 other people just like you!

Latest posts

Staff online

Members online

Top