i also tried "memtest64" the bootable version and the Windows one .
the bootable one give me 1 error and 4 passes.
and the Windows one did not stop giving me errors.
i am not sure if 1 error indicates that i have a RAM problem?
and i am assuming that the windows version may give errors cause there is a lot of programs that uses the RAM as will.
any idea ?
and thanks a lot