Date: Tue, 27 Mar 2001 23:46:10 -0800 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Hartmann, O." <ohartman@klima.physik.uni-mainz.de>, <freebsd-hardware@FreeBSD.ORG> Cc: <freebsd-questions@FreeBSD.ORG> Subject: RE: overheated PIII/KATMAI in SMP system Message-ID: <005401c0b75b$28208260$1401a8c0@tedm.placo.com> In-Reply-To: <Pine.BSF.4.33.0103280000480.1075-100000@klima.physik.uni-mainz.de>
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It is certainly possible to have a CPU failure that results in a CPU constantly overheating. In fact I've seen some components to where they are fine until the day that they overheat, and from that point on they will always overheat. If you swapped the CPU's and the overheating follows the CPU then most likely that CPU is bad and needs replacement. Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com >-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Hartmann, O. >Sent: Tuesday, March 27, 2001 2:02 PM >To: freebsd-hardware@FreeBSD.ORG >Cc: freebsd-questions@FreeBSD.ORG >Subject: overheated PIII/KATMAI in SMP system > > > >Dear Sirs. > >I need a little bit help and some technical hints. > >One of our SMP servers, a FreeBSD 4.-RC box, is not willing >to compile a world. It faults with SIG 11. > >The problem is caused by a overheated Intel Pentium III/600MHz >with KATMAI core. > >The main PCB is a ASUS P2B-D. Rear CPU slot is CPU 0. the inner >slot is for CPU 1. Today I swapped both CPUs and equipted both with >expensive fans and coolers. The case has a very, very good air >circulation, the rear is ventilated by two additional 80mm collers. > >Secanrio: CPU 1, in the last configuration the inner one, has a >temperature of about 32 -38 degrees Celsius. The outer one, CPU 0 >has 50 degress and up!! Yesterday I took measuremnets with swapped >CPUs, and figured out, that CPU 1, the inner one has 50 degrees and >the outer one, CPU 0 has only 30 to 40 degress. > >I switched kernel from SMP to UP and ran the system while compiling >a world. Both CPUs were not over 35 degress Celsius! > >Then I compiled a SMP kernel again and tryed to start make world. >CPU 0, the outer one, has now constantly about 50 degress Celsius. > >Well, due the fact of changing fan and coller elements by better ones >one fan is very close to the next SECC-2 case of CPU 1 (the inner one). >This handicaped fan is for CPU 0, the overheated one. But yesterday >exactly this CPU has the place of the "cooler" CPU, the inner one, >so I think not that this could be a real heatsink problem. > >I think the problem has to be targeted either by the mainboard (maybe >some kind of weakness in voltage regulation? But why only in SMP >mode of the kernel and not in UP mode?). Or the CPU has some faults. > >I switched again to UP kernel to see, whether temeprature is decreasing >or not. > >this is the actual output of "healthd -d -I" and "heat" as it reflects the >configuration at this moment: > > >HEAT: >System Temperature 69F (21.0C) >CPU1 Temperature 125F (52.0C) >CPU2 Temperature 95F (35.5C) >FAN2 314 RPMs (functional) >FAN3 312 RPMs (functional) > > >HEALTHD: > >************************ >* Hardware Information * >************************ >Asus: AS97127F >************************ > >Temp.= 21.0, 52.0, 35.5; Rot.= 0, 5113, 4821 >Vcore = 2.08, 2.05; Volt. = 3.22, 4.92, 12.04, -11.77, -5.11 >Temp.= 21.0, 52.0, 35.5; Rot.= 0, 5357, 4963 >Vcore = 2.06, 2.05; Volt. = 3.22, 4.89, 12.04, -11.77, -5.11 >Temp.= 21.0, 52.0, 35.5; Rot.= 0, 5113, 4963 >Vcore = 2.06, 2.05; Volt. = 3.22, 4.89, 11.98, -11.77, -5.11 > > >yesterday these values were vise-versa with exchanged CPUs ... > > >Please tell me your opinion: should I exchange mainboard first or >the suspected CPU? > >Thanks, > >oliver > >-- >MfG >O. Hartmann > >ohartman@klima.physik.uni-mainz.de >---------------------------------------------------------------- >IT-Administration des Institut fuer Physik der Atmosphaere (IPA) >---------------------------------------------------------------- >Johannes Gutenberg Universitaet Mainz >Becherweg 21 >55099 Mainz > >Tel: +496131/3924662 (Maschinensaal) >Tel: +496131/3924144 >FAX: +496131/3923532 > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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