Date: Mon, 27 Apr 2015 14:56:42 +0100 From: "Dave B" <g8kbvdave@googlemail.com> To: freebsd-questions@freebsd.org Subject: Re: Debugging bad memory problems Message-ID: <553E401A.6119.163DF7C@g8kbvdave.googlemail.com>
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On 26 Apr 2015 at 23:05, Fernando Apestegu=EDa wrote: > I booted from a memtest CD-ROM. It passed a couple of tests fine and > then it rebooted while doing a "bit fade" test at around 93%. > Removing the modules is tricky since this laptop has screws all > around in dark corners (even removing the battery needs a screw > driver). I will try to limit physical memory with hw.physmem and see > if it makes any difference. > > Thanks! > Check for CPU cooling problems too, such as an obstructed cooler or grumbl= y fan. (Also if you can, check for bad power supply issues.) Older AMD CPU's don't take kindly at all to running too hot, unlike some I= ntel devices that will start to cycle skipping to lower the disipation, just sl= owing down in effect. "Supliment the cooling" when running such tests, RAM can disipate quite a = bit of power when worked hard (as Memtest86 does.) Elevate the laptop and waft = air under it, but not in such a way as to oppose it's own intended airflow. Hope you find the trouble. Dave B.
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