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On 08/12/2016 09:10 AM, Valeri Galtsev wrote:
> 
> On Fri, August 12, 2016 10:51 am, Robert Fitzpatrick wrote:
>> Valeri Galtsev wrote:
>>> ... Run memtest96 at this point for at least 48 hours (or at the very
>>> minimum 2-3 full loops of test).

I use memtest86+:

    http://www.memtest.org/


> 1. re-seat all RAM modules.

I would advise testing before changing anything.  The strategy is:
devise a reproducible test that invokes the bug, use the test to isolate
the bug, fix the bug, re-run test to verify the bug is fixed, re-run the
test periodically to verify that that bug has not returned.


Also -- buy a power supply tester and use it.


David