I've got a question regarding the memtest86+: the ram sticks fail within first hour of test if I enable SMP option, but without SMP enabled they were running for 10 hours with 4 passes and no errors.
Why do they pass tests with SMP disabled?
I ran Prime95 with Large FFTs option and it reported the following errors
If I run Prime95 with the Small FFTs options then no problems are found:

Why do they pass tests with SMP disabled?
I ran Prime95 with Large FFTs option and it reported the following errors
Code:
[Fri Mar 5 13:01:51 2021]
FATAL ERROR: Rounding was 0.4991662188, expected less than 0.4
Hardware failure detected, consult stress.txt file.
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.

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