[CentOS] debugging RAM issues

on 3/13/2012 11:07 AM Ross Walker spake the following:
> On Mar 13, 2012, at 12:50 PM, Alan McKay<alan.mckay at gmail.com>  wrote:
>
>> Back about 3 months ago I took this system down and removed all the RAM,
>> and stuck individual chips into it and booted it, testing each chip on its
>> own.   At that time every single one of them worked!   But I'm about to try
>> this again to see what happens.   Back then I also ran memtest86 for some
>> time and it seemed OK too.
>
> It could be a bad physical RAM slot on the motherboard. Try filling the slots one at a time (or two if paired) until you hit the problem slot.
>
> -Ross
It could also be a power supply problem... Add memory load, and a bit of heat, 
and voltage drops a bit...