Morten Torstensen wrote: > tblader wrote: >> Thanks. I ran memtest86 off a knoppix5.1 cd for about 12 hours >> on all four sticks. It made 6 passes and did not return any >> errors. Perhaps I should have left it run longer? > > I don't trust memtest86 for 64-bit mode kernels... I've seen examples > of it running just fine for days, when the kernel barfs after an hours > usage. It is just 2 machines, so not a large sample from my side. > > Clocking down the memory helped in one case. > I do think a 64bit version of memtest86 would be a good thing... I'm unclear how a 32bit app could test memory above about 3GB unless its playing the PAE game (3GB because in a 32bit system, the PCI bus peripherals take about the top ~ 1GB for their I/O space, so the ram has to be mapped to a higher physical address, only accessible via PAE...