Guys i have problem with my ecc fatbodies.There is no option in bios.I can see it at first boot (when i have cleared cmos) but no option in bios.Moreover it disappears when i reboot.I found that others have the same problem here,but the problem still remains.Can anyone help me with this?

Ram is fine and tested with a lot of boards (six p5wdh and work fine with three of them).