CPU overheating/usage problems!

xagent

Member
Aug 10, 2002
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Ok, i've had my Athlon tbird 1.4 GHz with the Soyo Dragon motherboard with VIA chipset for nearly a year now with no problems up until a month ago. It was even overclocked by 100 MHz to 1.5 all the time. And i had a good Antec full tower case, lots of airflow, and a good heatsink/fan - the Antec Jet Cool.

i formatted about a month and a half ago due to some unrelated problem (IE and My Computer took a minute to load after clicking on them but rest of the computer ran perfectly fast)

when formatting I got a new hard drive, the IBM Deskstar 80 GB 7200 rpm

well about 2 weeks after my computer just mysteriously froze three times one afternoon and evening. First time i didn't suspect anything, but third time my computer wouldn't reboot as i didn't hear the double set of beeps and nothing showed up. I had a feeling it might be some fail safe thing in the BIOS and my CPu was overheating. I left it off for 15 minutes came back, it booted up but everytime i went to the BIOS to look at the temperature it would go to the temp section and jsut freeze there, esc or any buttons didn't work. my BIOS would just freeze. and the shocking thing was the temperature reading was 75 degrees Celsius! i knew this was too high, so I shut down for 2 hours, came back and downloaded a CPU temp program called Speedfan quickly and it showed my temperature rise from 30 something degrees to 64 degrees in just 5-10 minutes after booting up.

I shut down for the night, and the next day and for the next week it ran fine... 55(idle) - 59(in use) degrees. but that's only with the AC on in the house. With the AC off it ran from 59-61 degrees at IDLE and i never let it get higher cause i just turned the AC on.

i left my comp on overnight and 24/7 as usual for a week until one morning i noticed everything kept going slow every now and then. windows when maximized and minimized would stutter, if i right clicked, it'd take a couple of second for the window to pop up. i couldnt test any games cause i hadn't reinstalled any after formatting. i reboot, go out for the rest of the day and come back to find my computer frozen and the idle temperature at 61 degrees.

even weirder... looking at Speedfan i noticed the CPU usage kept spiking to 100% every 3-5 seconds, then jumping back to 10-30%, then back to 100. and i had NO programs running except speedfan. and for the first minute after rebooting it would run fine but after than minute is when it would start spiking, as if something kept randomly using my CPU every few seconds. i thouht i had a virus. even leaving it off the whole night did nothing.

then mysteriously i reboot to install a virus scan software and notice my comp running at full speed and normal, and CPU temperature staying at 57-58 degrees. i scanned for viruses and found none, and CPu usage no longer spiked. it was weird and I did nothing to cause the spikage to start, or stop.

so it was back to normal,,, 56-59 degrees in usage with the AC on. but whenever the AC was off temperature rose up to 5 degrees, even at idle.

i go on vacation for a week and come back to find the temperature has slowly risen again. This time even with the AC on in the house it runns from 59-60 degrees, even at idle, and with the AC off it went from 61-64 degrees. The only programs i ever have open are AIM, Winamp, Internet explorer, and sometimes mIRC. but i don't even play games. i can't imagine what the temperature would rise to if I were to install my games back up and start playing first person shooters, let alone overclock it again.

sorry for the long post, but ANYONE got a clue why my computer is doing this? The sudden overheating to 75 degrees, the freezing, then going back to normal for weeks, then the CPU usage randomly spiking to 100%, then stopping after a day, and now the temperatures slowly rising. I know for a fact that 61 degrees is too hot for an idle CPU, even one in use. and why is the AC being on and of in my house seeming to make such a difference?

Could it be that i'm using a heatpad instead of thermal compound... but I did have it overclocked and played nonstop games for a year with the heatpad perfectly fine... or do heatpads wear out after time and you gotta replace them? I checked my fan thru the BIOS (when it doesn't freeze) and thru speedfan and it's running fine.
 

vetteguy

Diamond Member
Sep 12, 2001
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When you installed the new hard drive, you didn't by chance unplug the fan on the heatsink, did you? I did that a few weeks ago to my 1.4, and couldn't figure out why it was idling at 65C. If it's still plugged in, maybe check the seating of the HSF to make sure it didn't get bumped.
 

RemyCanad

Golden Member
Sep 28, 2001
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Is your fan on your heat sink plugged into a fan header on your motherboard? If so make sure it is plugged in nice and tight. You might want to move it to another fan header even. You might want to replace the fan and see if it keeps it up.

You might just have a fan that is about to die. Or just some loose connections on the fans power cable. You might want to run a program that will monitor your power and keep track of it. Then look in the history of it and see if you are getting power spikes or anything like that.

As far as the 100% CPU usage I am just not sure. On this board there has been multiple threads about a problem simial to this. As far as I know the only way they have solved it was to reinstall the OS. Also did you install windows with your CPU overclocked?
 

xagent

Member
Aug 10, 2002
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no i'm positive the fan is running. i checked the speed thru the BIOS and through Speedfan and it's running, at 4,800 rpm. and as for the bumping... i had installed the new HD and it was running fine with no problems for like nearly 2 weeks.

and it was not overclocked when i installed Windows. i overclocked it after i installed the new CPU and formatter originally a year ago. and like 2 months ago i was in the BIOS trying to set my Parallel port to ECP mode to get my all in one machine's scanner to work, but everytime i turned on the comp i'd get a Windows Protection error, so i reset the BIOS to Optimized defaults, and never overclocked it again, and it was like a few weeks to a month after this that the problems started

wow... my computer was off for one and a half hours just now, turned it back on and it's at 61 degrees Celsius in just 5 minutes
 

xagent

Member
Aug 10, 2002
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just last week when i thouht all problems were settled my comp was running fine, 55-59 degrees. but now it's average temperature is 61-64. why the sudden rise. it was off for the entire week as i was on vacation.

I just tried running Scandisk but i can't because everytime I do my temperature shoots up to 70+ so i jsut shut down when it hit 73.
 

PerBjarneby

Junior Member
Aug 9, 2002
4
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Here is something you could do. Open your case and put a regular fan outside it blowing air into the case. I use this and my CPU never goes over 34 C.
 

Texun

Platinum Member
Oct 21, 2001
2,058
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Can't say for sure about the CPU spikes. Have you checked Task Manager for other applications running, and not just in the system tray? Anything odd or that you don't recognize?

As far as the overheating.... The system worked fine before so something in the hardware has changed. Even with CPU spikes the temp shouldn't skyrocket to 75C.

Any chance you may have bumped the HS during the installation of the hard drive? Perhaps it was bumped and is no longer making 100% contact with the CPU.

You said you were positive the fan was still working; is it working all the time or could it be intermittent?

How about the PS fan? Loss of ventallation would cause an increase, but since the temperature increases quickly I would still be suspect of a problem around the CPU\HS area.

Many people prefer Artic Silver compound, but the stock thermal pad should still be able to keep things in cheack.

I would suggest pulling HS and checking the contact area, then clean and reapply some thermal paste to the HS and see if that helps. And of course check all other fans and vents in the case, blow out any dust with a can of compressed air.
 

xagent

Member
Aug 10, 2002
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i'm running WIndows 98 btw

there are no other programs running, i chekced in ctrl alt delete and by holding alt tab, and checking the startup program list in msconfig. it's just the regular stuff. Explorer, Point32(the intellimouse drivers), system tray and usual windows stuff like that.

and yes the CPU fan is working always i checked. and the power supply fan is working too, i can always feel it blowing out hot air out the back of my computer.

and i don't want to have to mod it and add a bunch of stuff just to get it running like it was, because before it was running fine overclocked for a year
 

RemyCanad

Golden Member
Sep 28, 2001
1,849
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Have you monitored your CPU volatge yet? Maby it could be spikig.

I would say take the HSF off of your CPU and take the CPU out. Give it a good looking over and then reseat. Now get that thermal pad off of there and put some thermal past on it.