I have Tried them in each slot according to the book and then I tried one in slot 1 of A no boot. then I tried one in slot 4 of B chandle and it will boot I have placed one in slot 1 of A chanel and one in slot four both are CMX512-3200LLPT. No boot and Sound from speaker and Flashing power light. If I put one or both in Channel B It will boot and run in single mode and power light is steady. Any suggestions will be appreciated.