I have an ASUS P8Z77-V motherboard and have been having an issue with memory recognition. I'm to smart with comps so I'll explain the best I can. On my MB I have 4 slots for memory. 2 black and 2 blue. I have a 4GB stick in the first black slot and a 4GB stick in the first blue slot. The computer reads this memory fine. When I attempted to place a 4GB stick of matching memory in the other black and blue slots the computer wouldn't boot up. A red lit up on the MB. The memory is CORSAIR Vengeance DDR3. All the memory is the same.