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  Atholon XP 2800+ COOKING TO DEATH ? 
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Tay Diggs Jan 18, 2011, 12:30am EST Report Abuse
I have an ASUS A7N8X (version 2.0) motherboard with Athlon XP 2800+ cpu (not overclocked).

The BIOS temperature is reading 65'C. Within Windows XP (SP3) running Motherboard Monitor 5 it is reading a low/high range of 71'C to 93'C for CPU Diode.

For CPUID HWMonitor Pro it is reading 52'C min and max for TMPIN0 and 27'C for TMPIN1.

Is my CPU cooking to death? Which app is telling the correct CPU temperature? Is MBM5's settings correct (Sensor: CPU Diode, Board Sensor: W83L785TS-S)? There is a Thermaltake Volcano CPU hsf on the processor runing at 2400 rpm, chassis fan speed 2700 rpm, MB temp = 26'C. I've now raised the cpu fan speed to 5800 rpms and the cpu temperature is leveling off at 68'C. Very loud

The cpu has been running at around 65'c for over a couple years if i remember correctly but today checking the temperature it seems much higher these days. Can you recommend a quiet but very effective CPU HSF for this Athlon XP 2800+ processor?

Or would a P4 3.2GHZ mobo + cpu be better. I can get one for $20. I'm not picky on old PCs.


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micro Jan 18, 2011, 02:29am EST Report Abuse
>> Re: Atholon XP 2800 COOKING TO DEATH ?
First off, the thermal paste is supposed to be replaced on a yearly basis. I assume that the pc has been up and running for 3+ years. This should drop your temps greatly. (or if you just put thermal past on, it is too thick.) Artic silver or tunic thermal paste will drop the temps 3c+ over stock thermal paste.

Any aftermarket cooler would really help it cool, compared to stock.Since you already have the volcano I assume that the thermal paste could have been put on too thick when first installed.
you could also lap your cooler (sand paper,glass etc to plane it flat, this will drop your temps about 5c) Google will give instructions.

Its been a while, but you should try to keep it under 60c, anything over about 70c can hurt the cpu.

The cpu temp monitoring from that area was always high on one software and low on the other, that is typical. Just kind of take a half way point and you should be safe.

As far as switching to the p4. I am not sure what would be better. I thought the p4 was a fairly slow cpu though. (wait on more advice on this though). Obvious question will be, what p4 etc.

Then the obvious, did you clean away the dirt/lint from inside the case, coolers?

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john albrich Jan 18, 2011, 06:16am EST Report Abuse
>> Re: Atholon XP 2800 COOKING TO DEATH ?
Tay Diggs said:
...Is my CPU cooking to death? Which app is telling the correct CPU temperature?....

As micro said, readings vary between applications. Some assume or incorrectly ID the wrong sensor, some use the wrong raw-data conversion algorithm, etc. They can be correct on one motherboard and/or CPU and way off on another.

I generally have the most confidence in the BIOS Setting menu temperature report, however it too can have problems. One example, if your CPU is not specifically approved for use on that motherboard, it may report the wrong information. The BIOS might be using a diode sensor algorithm when it shouldn't. Or, it might be using a CPU case sensor algorithm when it should be using an on-die sensor algorithm. The calculations can differ and if the wrong algorithm is used the temperature reported can be wrong. To make things even more complicated, the CPU manufacturer may specify the maximum "safe" temperature is based on the on-die temperature, while for another CPU is based on the "case" temperature. So even if you get a valid temp report, it may not be the temp reading needed to ensure you're keeping things cool enough.

One way you may be able to at least determine which program is closest to the "right" temperature is to completely turn off your system* (use PSU back power switch or remove the plug from AC mains) and let it cool to room ambient for an hour or so (cover off). Then leaving the cover off, re-provide AC power and power up into BIOS settings menu and immediately look at the temp reading there. It should be reasonably close to ambient (e.g. within ~10C +/-). If the ambient is 20C and it reads 40C within moments after power-up, then the temperature reporting subsystem probably isn't working right...or as micro suggested your heatsink may be malfunctioning.

If the temperature reporting subsystem isn't working right, then no program will report the right data.

However, you might also repeat the above sequence of operations and as soon as possible** run the various temperature monitoring programs and note their readings. They too should be reasonably close to room ambient.

*If you don't remove ALL power, the motherboard remains powered-on to some extent. This is to support things like "awake from sleep" mode, keep USB ports powered-up and active, etc. And of course any the motherboard is powered-on, it is producing heat and internal system sensors likely would show readings higher than room ambient...thus skewing the readings/results.

**As soon as possible=before turning off the system and disconnecting power, disable all "start-up" programs that will slow down access to the temp monitoring programs. In other words, streamline and make the boot-up as simple/fast as possible.

Dublin_Gunner Jan 18, 2011, 07:12am EST Report Abuse
>> Re: Atholon XP 2800 COOKING TO DEATH ?
Start with the simple solutions.

Clean all your fans and the CPU heatsink so they're clear of dust (in fact, clear the entire case from dust).

If you know how (I'm going to assume you do) remove the CPU's heatsink. Clean the CPU thoroughly using isopropyl alcohol, and clean the underside of the heatsink also. Ensure there is NO trace of thermal compound remaining.

Re-apply some new thermal compound - if you don't have any artic silver 5 etc, just get any thermal grease (at this moment, the improvement should still be quite large) and re-seat the heatsink & fan.

This alone should help to reduce the temperatures.

However, you may have a power distribution issue with the CPU power circuitry, which is causing a over current / over volt situation that may be causing the overheating issue with the CPU. This can happen with either lower quality regulation chips, or indeed if they are beginning to wear out from use over the years (they may have become damaged for extensive use).

But for the moment, replacing the heatsink (and cleaning) should at least help to rule out that, before deciding that the issue may be something that requires a CPU or motherboard replacement.

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