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08-17-2003, 01:15 PM
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#1 (permalink)
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Can a bad CPU cause overheating??
Has anyone experienced an Athlon processor that had a defect that caused it to overheat??
I have a 1.33 Ghz TBird that ran fine for about 2 years before it started to overheat - reaching temps in the low 60's C.
Since then, I've tried it on two different MB's, used two different heat sinks (the OEM retail HSF and a good aftermarket cooler), and reseated the heat sink multiple times, using three different thermal compounds, including AS3. No matter what I do, it keeps running hot.
On the current setup, I tried swapping the TBird for an XP1700 (AXDA type A). The XP1700 ran in the low 40's at full load using the identical setup including HSF. The Tbird averages 63 at full load. This is running at stock speed, core voltage reads 1.73, and the case is wide open.
I've used several 1.33 TBirds, but never had a problem like this. I've just about come to the conclusion that there's some kind of defect that has developed in this chip that is causing it to heat up.
Any other ideas??
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08-17-2003, 01:26 PM
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#2 (permalink)
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Woah, that voltage is kinda high don't you think? I run mine at 1.68, and I'm using an Athlon XP 2500+ "Barton", go to the AMD website and check for the needed voltage for that CPU.
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08-17-2003, 01:52 PM
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#3 (permalink)
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| Quote: Originally posted by Arcuivie
Woah, that voltage is kinda high don't you think? I run mine at 1.68, and I'm using an Athlon XP 2500+ "Barton", go to the AMD website and check for the needed voltage for that CPU. | T-Bird standard voltage is 1.75.... that is to spec. As a matter of fact, I ran my T-Bird 1.2/200 at 1.4/266 for a couple years at 1.85 vcore.
Ragtop... are you getting any heat-related errors? If not, maybe the mobos you are using have the thermal sensor in a spot a wee bit closer to the CPU core?
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Last edited by jmichna; 08-17-2003 at 01:54 PM.
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08-17-2003, 03:16 PM
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#4 (permalink)
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jmichna:
That's why I tested the XP1700 vs the TBird. Using the same board (& same temp sensor), there's a 20C difference between the two. I know the newer XP's run a bit cooler, but not 43C vs 63C.
Also, just judging by touch, the heat sink gets very warm with the TBird (its much cooler with the XP1700).
I have another 1.33 TBird running on another one of my systems. Maybe I'll pull it and run them back to back to see what the difference is. (I just hate pulling stuff out of systems that are working fine).
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08-17-2003, 03:24 PM
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#5 (permalink)
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Did you scrape the old thermal goop off the core before reapplying?
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08-17-2003, 04:37 PM
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#6 (permalink)
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Yes, everything was thoroughly cleaned each time, before reapplying compound and reinstalling the HSF.
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08-17-2003, 04:57 PM
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#7 (permalink)
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ragtop,
Which mobo are you using? My EPoX 8K3A+ "reads" T-Breds hotter than T-Birds. I know that's not the same issue as you are having, but it helps to have more info.
Maybe there is a "halt" instruction that is no longer being fired off?
Maybe take a real close look (magnifying glass) and look for a small dink out of a corner some where?
I have never heard of a CPU getting hotter just because of age.
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08-17-2003, 07:41 PM
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#8 (permalink)
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Well, I pulled the HSF off one more time & noticed the factory machining on the contact surface wasn't that great (pretty significant grooves).
I lapped the surface to a smooth finish & reinstalled with AS3 and that got the temp down to about 47C idle, 52C full load - not great, but acceptable to me, given that the ambient room temperature is pretty hot right now (probably 27 or 28C)
BTW - I'm using a Leadtek Winfast 7350 KDA. (SIS 735 chipset, similar to an ECS K7S5A, but with better overclocking features.)
Last edited by ragtop; 08-17-2003 at 07:44 PM.
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08-17-2003, 07:45 PM
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#9 (permalink)
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| Quote: Originally posted by jmichna
Maybe there is a "halt" instruction that is no longer being fired off?
| One more thing - Can you explain this a little better??
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08-17-2003, 08:01 PM
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#10 (permalink)
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| Quote: Originally posted by ragtop
One more thing - Can you explain this a little better?? | WinXP (and maybe W2K) had a built-in instruction to put the CPU into idle mode (like "Rain" and "cpuidle" for the W95/W98/WMe Os'es).
The halt instruction would make the CPU run cooler unless you were doing Seti or something else that was running at 100% CPU output.
In my post above, I was grasping at straws at this point... and I really don't think the halt instruction has anything to do with your issue... unless... maybe... you changed the BIOS rev and see higher temps since then.
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