Date: Tue, 21 Oct 2003 01:49:12 -0700 (PDT)
From: Don Lewis <truckman@FreeBSD.org>
To: peterjeremy@optushome.com.au
Cc: freebsd-current@FreeBSD.org
Subject: Re: Random signals in {build,install}world recently?
Message-ID: <200310210849.h9L8nCeF005528@gw.catspoiler.org>
In-Reply-To: <20031021080625.GA14585@server.c211-28-27-130.belrs2.nsw.optusnet.com.au>
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On 21 Oct, Peter Jeremy wrote: > On Mon, Oct 20, 2003 at 11:45:21PM -0700, Terry Lambert wrote: >>I've noticed a lot of bad problems with Hynix memory lately; your >>mileage may vary. At Whistle we had a problem with memory with Gold >>contacts, and didn't have any problems with the ones with Tin. > > A good rule of thumb is to make sure that the finish on the DIMM > contacts are the same as the ones on the DIMM socket - both gold or > both tin. Note that whilst gold doesn't oxidise, it's fairly easy > to make a gold coating so thin that it's gas permeable allowing the > underlying metal to oxidise. Mixing tin and gold can cause galvanic corrosion. You can also have connection problems due to the buildup of tin oxide on the gold surface. I had memory corruption problems on my Athlon UP system that I tracked down to a memory timing misconfiguration. My memory was rated for a CAS Latency of 2.5, but the motherboard BIOS in "auto" memory configuration mode set the timing to 2.0. When I manually configured the memory timing, the errors went away. The memory errors would show up as random file corruption in "make buildworld", and I also saw errors on one of the last tests that memtest86 performs.
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