Quote Originally Posted by Mudflap
... memory tests did reveal a Modulo 20 error though so I now have to dig into what that means...
If Memtest86+ was used to test memory,
As SpywareDr already stated, there should be no error(s) displayed, PERIOD.

If there are any error(s) displayed,
Defective/damaged memory
and/or
Defective/damaged mobo.