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#51
Just start the test (which ever one) when the machine is 'cold', as quickly as you can, if it is due to the cold boot scenario then you should get errors right away.
It is due to the fact that the physical equipment is not 'warmed up' or the starting configuration settings are not enough to let the system run stable.
For example: idle voltage for CPU, integrated memory controller or other settings is not enough for the system to run stable, or the RAM may have borderline low voltage and can't function properly when it gets heavy use on startup.
Sometimes bumping the CPU, IMC or RAM voltage will solve this issue, but OEM computers don't allow you to change those settings. Usually the components will need to be replaced.