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CPU Overheats at One House but Not at Another House

by nuyorker / March 14, 2007 7:48 AM PDT

I built a somewhat high end machine for my brother-in-law gigabyte M/B GA-965P-DQ6, 2 GB Corsair Memory, Sapphire Radeon X1800GTO PCIe x16, SATA II 400 GB drive and SATA II DVD every format, 550W Seasonic S12 PSU. I used the packaged Intel CPU fan on a Dual Core 2 E6600 CPU. No over clocking.

Problem: at his place he reports a temperature alarm on the CPU at over 60 degrees C. He doesn't use it for gaming and sometimes it's just idling. I bring it back to my place and run it with a CPU and I/O intensive PERL script simultaneously with a McAfee virus scan and Firefox surfing. I get maybe 42 degrees C. It idles at 36 degrees. I've never seen anything like this. It's been running 24 x 4 days so far and nothing unusual. Thoughts?
TIA.

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CPU Overheats at One House but Not at Another House
by Stan Chambers / March 14, 2007 8:44 AM PDT

There's obviously a problem with the room temperature, or the placement of the case. Many cases have air intake vents underneath the case. If the case is placed on carpeting or other soft surface, air flow can be cut off to the interior of the case, causing overheating.

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More about the fans in the case
by nuyorker / March 14, 2007 9:26 AM PDT

Good points. He has it on a table (hard surface). There is an intake fan in the front unobstructed and a fan/vent on the left side, also unobstrucetd as I remember. The PSU has a 12cm exhaust fan, i.e., the fan is pointing into the case. I just added an 80mm exhaust fan at the top of the aluminum Lian-Li case.

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Power Source Fluctuations?
by Grif Thomas Forum moderator / March 14, 2007 9:08 AM PDT

I've seen electrical equipment do funny things when the power at the outlet was either too high, or too low, on substandard buildings.. Is your brother-in-law using a UPS power supply to run the machine? If so, remove it and plug directly into the wall.. If UPS is used, try using one. See if a steady power source will help the problem.

Hope this helps.

Grif

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More about the electrical situation
by nuyorker / March 14, 2007 9:40 AM PDT

I'm hoping this is the issue. I elected to get him a Tripp Lite line conditioner rather than an UPS. His place is somewhat old, a former stable/carriage house that was converted to a car garage. He lives above that. The main house was built before there was electricity. He reported that the lights flicker sometimes. Before this PC, he had a Dell Celeron-based PC and didn't experience a problem. I feel my reputation is on the line.

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Appears that the problem is solved with the Line Conditioner
by nuyorker / March 21, 2007 2:59 AM PDT

After 5 days, the heating problem has not re-appeared. The Tripp Lite unit was indicating periodic low voltage readings. This is out of my league but I can only imagine that the CPU fan must have turned off causing the temperature to rise and the alarm set off at his place.

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