Date: Mon, 7 Nov 2005 09:44:47 -0800 (PST) From: Bill Schoolcraft <bill@wiliweld.com> To: Micah <micahjon@ywave.com> Cc: freebsd-questions@freebsd.org, Alex Zbyslaw <xfb52@dial.pipex.com> Subject: Re: Diagnosing reboot under load Message-ID: <20051107094015.R55967@liam.billschoolcraft.com> In-Reply-To: <436F8E2E.802@ywave.com> References: <436E739E.8020605@ywave.com> <436E7599.9090003@cs.earlham.edu> <436E7D4E.6080707@ywave.com> <F3441A15-7CD9-4B7E-8AE9-359B59658C82@u.washington.edu> <436E9DF0.1080408@ywave.com> <436F1779.7090807@u.washington.edu> <436F6B5F.9000304@ywave.com> <20051107100935.31771357.wmoran@potentialtech.com> <20051107102617.3abfd2c5.wmoran@potentialtech.com> <436F896B.2040404@dial.pipex.com> <436F8E2E.802@ywave.com>
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At Mon, 7 Nov 2005 it looks like Micah composed: > Alex Zbyslaw wrote: >> Bill Moran wrote: >> >>> Bill Moran <wmoran@potentialtech.com> wrote: >>> >>> >>>> Micah <micahjon@ywave.com> wrote: >>>> >>>> >>>>> I'm running the i386 version of FreeBSD with 1gb ram. Didn't think to >>>>> check this before, but I'm getting ~112-113 volts into the PSU from the >>>>> surge strip. I'm probably going to get a new PSU today. The parts >>>>> store has a couple of 400 watters in the $50 range (a fortron and a >>>>> thermaltake). >>>>> >>>> >>>> Cheap power supplies are a near guarantee that your computer will be >>>> unstable. Unfortunately, $cheap doesn't always == quality cheap. >>>> >>> >>> I recommend the more recent one as a guage for what manufacturers you >>> can trust. Frankly, if you're only spending $50 on a 400W, you're >>> probably getting a piece of junk - although Fortron has been rating >>> well in Tom's tests. >>> >> A PSU actually capable of 350W *ought* to have done you fine, but many >> cheap PSUs, as Bill says, just don't cut it. I'd personally recommend a >> Seasonic, which won't be cheap, but will be quiet and reliable if mine is >> anything to go by. Antec also seem to have a reasonable rep. >> >> There's a nice wattage claculator here: >> http://www.jscustompcs.com/power_supply/Power_Supply_Calculator.php? >> >> --Alex > > Thanks for the link. I actually used that calculator when I pieced this > machine together. > > I'm really beginning to doubt it's the PSU. Why? I cannot get the output > voltage to drop no matter what load I throw at it. I plugged in four > additional hard drives and ran a system stress test and still the voltages > remained rock steady at the values I stated earlier. I ran it for an hours > with the high-low monitor on a Fluke multimeter. The +5 stayed near 5.1 with > 5.08 as the bottom, and the +12 stayed near 11.89 with 11.84 as the minimum. > I even had one of the "random segfaults" and the +12 voltage never dropped > below 11.84. I'm not sure how I can get the load any higher without using > resistors which most certainly does not simulate the load I'm generating > while compiling. Hello, How were you using the Fluke meter to test amperage? I was not aware that it would work with a ground line embedded inside the power cable? I currently have a Fluke-T5-600 and I'm curious about the above test. http://www.tequipment.net/FlukeT5-600VoltageTester.html Thanks
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