I already did come up with why. The memory is defective or there is a bios settings wrong for your setup.
Test the modules one at a time, and make sure it's 8-10 passes each. If bios is well, you'll surely find the errors, even in fit takes time.
Uninstall all motherboard utilities and in the bios, disable any CPU throttling, like Speedstep, Cool N Quiet or EIST.