>> From experience i'd say few things might be the problem > > a) incompatible memory or too tight timings for dual channel to work > properly (if it's dual-channel). I for example have to reduce timing on > one dual-core Athlon64 from 1T to 2T or the box isn't stable even with > lowered (manually) DDR-speeds. Not even with BH-5 chips. > > b) CPU itself is overheating which makes gcc internal checking fail. > This should manifest itself differently tho (the signal 11 syndfrome). > > I do remember having those segfaults with too tight memory timings > sometimes. Usually the box just hard locked every time in less than > hour. The 1GB setup (2x512MB) was fine with any timing if not using > dual-channel, but dual-channel just didn't work with default timings. > The mobo here is DFI LanParty (something PCI-E) which has been happy > with 4x512MB dual-sided DDR-400 (should be reduced to 333 tho) after > diabling the 1T timings. > > I can't say that this is the problem, but from the symptoms i'd pretty > much say it is. Hi Pasi! Nice hearing you again :) Thanks for the input. This box has been running Centos 3.5 for over a year now without any stability problems (running plain vanilla kernel 2.6). It's a single core Athlon64. I guess that would pretty much rule out a hardware problem? I'll try to reduce the timings anyway. Cheers! Remco