I had same problem with 01/25 Bios. I wanted to set the votage to 2.8, but it didn't let me do it. I tweak it to 2.9, after two times try, I succeded. Now my bios can set 2.8, 2.7,.. whateever you want.(same 01/25 bios) Magic seems hovering on the board. My rig now runs flawless, I did memtest...