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Strange temperature jump - help?

post #1 of 22
Thread Starter 
Hello everyone. I'm not an overclocker, but I've been struggling with a weird temperature problem for a while and I'm looking for help from competent people. I am an IT professional, but I've never dealt with temperature issues.

The setup - P4 3.0 ghz on an Asus P5GD2 mobo. The CPU has its standard fan. It's noisy like hell, but it works. Used to, anyway.

When I first bought the system, it worked. Asus Probe reported 70 Celsius, with the fan going at about 5000 RPM. Today I know that these values are both too high, but back then I didn't care, since the system was stable.

Some time later, due to unrelated issues, I upgraded the motherboard's BIOS. I didn't notice any change at the moment.

A week ago, the computer suddenly powers off. There is some burning smell in the air, and it won't power on. I curse for a while, figuring that the power supply must have broken down, but after a few minutes it works again normally.

I scratch my head and think that it sounds like overheating. You guys would probably have put this like "of course it's overheating", but as I said I've never encountered temperature issues before. My previous box was a p3 800.

So I launch Asus Probe, and find that it reports 80+ Celsius, with the fan going at about 2700 RPM. I speak with a friend, he says that Asus Probe is obviously not working and that I shouldn't worry.

When I tried to put the system back at 3.0 ghz, the BIOS refused to boot; I had to wait for it to cool down before setting it back to two point something. At 2.4 ghz, the BIOS monitor reported one-friggin'-HUNDRED Celsius. With the fan still going at 2700 RPM, and me completely unable to make it go faster (I've tried disabling Qfan, enabling Qfan, using every possible setting, to no avail; it stays at 2700 RPM even if the CPU is about to explode).

After a few more power offs, a lot more POST errors, and checking that the BIOS monitor confirms what Probe says, I am currently with a system that runs at 50% CPU speed, about 78-82 Celsius - and the fan going at 2600 RPM.

Questions:
- what could possibly have happened? The system used to work.
- why is the fan going at 2600 RPM, if it was able to go at 5000+ and the CPU temperature requires it?
- is it even possible for the processor to reach a hundred celsius without burning? I begin to suspect that the temperature sensor is broken.

Help!
My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
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My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
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post #2 of 22
Hmm, I've almost the same processor like yours, and the temp. are something about 34 idle. and 62full.

My Q-Fan are enabled and the target temperature are 57ºC.

Using normal, Msn, internet explorer and other low programs, the temp. are 42ºC.

Verify the thermal conductive, use the Artic Silver 5, the best thermal conductive, it will work better.

At first look, the sensor is OK, and the the faster rpm in my PC is 3.000rpm...in full mode processing @ 62ºC.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4300 Asus Striker Extreme modded eVGA 7600GT 2x1gb G.skill D9GMH 
Hard DriveOSMonitorKeyboard
Seagate 500gb Windows XP SP2 EN Samsung 931BW Microsoft Comfort Curve 2000 
PowerCaseMouse
Zippy 500w R820 MS Laser 6000 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4300 Asus Striker Extreme modded eVGA 7600GT 2x1gb G.skill D9GMH 
Hard DriveOSMonitorKeyboard
Seagate 500gb Windows XP SP2 EN Samsung 931BW Microsoft Comfort Curve 2000 
PowerCaseMouse
Zippy 500w R820 MS Laser 6000 
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Reply
post #3 of 22
Did you try reverting to the old BIOS ?
I don't know if your sensors are broken, I mean the machine is shutting down and refusing to boot/post until it cools down. If the sensors were damaged the machine would still behave in a normal way.
How many case fans do you have installed ? what are their sizes ? Where are they installed ?
Last but not least, please fill in your system specs by clicking on "User CP" on the upper left section of the webpage and then click on "Edit System Specs".
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
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My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
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post #4 of 22
sounds like your heatsink may have crapped out on you. you might look at getting a new one, like a zalman 7700. that's a good one that can tame the prescott's heat pretty well.

http://www.newegg.com/Product/Produc...82E16835118115
post #5 of 22
Thread Starter 
I'll change the fan and dissipator if all else fails... but I'm trying to understand how could things change so dramatically. The system used to run at 3.0 ghz at 70 Celsius, and now it runs at 1.5 ghz at 82 Celsius. There's got to be something wrong.

I mean, we're talking about 50% frequency, and still too hot. It's not a matter of quality; there's something seriously broken here. And I can't figure out what.

If it was a brand new system, I'd think that the CPU was defective, or that I've mounted the dissipator and fan incorrectly. But it worked fine for almost one year.

edit - Tobuk, that's something I didn't consider. How can a heatsink break anyway? Isn't it just basically a big shaped piece of metal? (I know, I'm soooo newbie )

z_one: I can't revert to the old BIOS. It would screw up my RAID. The mobo has no fans; the CPU has its standard fan; the graphic card has its standard fan. There is nothing else, but the problem is too dramatic to be a quality issue... surely I don't need extra fans to run my CPU above 50% efficiency.
My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
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My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
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post #6 of 22
Quote:
Zappo wrote:
The mobo has no fans
I was asking about the case fans. Are there any fans installed on your case ?
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
  hide details  
Reply
post #7 of 22
Thread Starter 
Sorry. No case fans, but I'm leaving one side open.
My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
  hide details  
Reply
post #8 of 22
Did someone open a hoover bag next to your PC?! lol, get dust sucked in by the PSU? It sounds like your PSU. If all you done was change the BIOS and nothing else a new heatsink isnt gonna do alot if the one you got now is clean.
    
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5GHz 1.4v ASRock Z68 Extreme3 Gen3 MSI R9 290x Gaming 2x4GB Corsair XMS3 1600 
Hard DriveHard DriveCoolingOS
Crucial BX100 250GB Toshiba 2TB Thermalright Macho 120 Rev.A Win 10 Sexy Phwoar bits 
MonitorKeyboardPowerCase
LG 29UM68 (2560x1080) Logitech MK600 SuperFlower GG HX 650W FD Define R4 White Window 
MouseMouse PadAudioAudio
Logitech G502 CM SWIFT-RX XXL Cheap USB DAC Epiphany Acoustics EHP-O2 
Audio
AKG K612 Pro 
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CPUMotherboardGraphicsRAM
i5 2500k @ 4.5GHz 1.4v ASRock Z68 Extreme3 Gen3 MSI R9 290x Gaming 2x4GB Corsair XMS3 1600 
Hard DriveHard DriveCoolingOS
Crucial BX100 250GB Toshiba 2TB Thermalright Macho 120 Rev.A Win 10 Sexy Phwoar bits 
MonitorKeyboardPowerCase
LG 29UM68 (2560x1080) Logitech MK600 SuperFlower GG HX 650W FD Define R4 White Window 
MouseMouse PadAudioAudio
Logitech G502 CM SWIFT-RX XXL Cheap USB DAC Epiphany Acoustics EHP-O2 
Audio
AKG K612 Pro 
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Reply
post #9 of 22
You don't need to change the fan, i'm using the stock cooler (box), and my pc @ 40ºC.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4300 Asus Striker Extreme modded eVGA 7600GT 2x1gb G.skill D9GMH 
Hard DriveOSMonitorKeyboard
Seagate 500gb Windows XP SP2 EN Samsung 931BW Microsoft Comfort Curve 2000 
PowerCaseMouse
Zippy 500w R820 MS Laser 6000 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4300 Asus Striker Extreme modded eVGA 7600GT 2x1gb G.skill D9GMH 
Hard DriveOSMonitorKeyboard
Seagate 500gb Windows XP SP2 EN Samsung 931BW Microsoft Comfort Curve 2000 
PowerCaseMouse
Zippy 500w R820 MS Laser 6000 
  hide details  
Reply
post #10 of 22
Thread Starter 
Could a dusty PSU cause the CPU (and only the CPU - mobo temperature is normal and graphic card works fine) to overheat?

Could dust have gotten into the CPU dissipator? If so, how would I clean it?
My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOS
P4 3.0 Asus P5GD2 Win2k 
  hide details  
Reply
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