Well I have been having issues with dual channel on my mobo. I talked to ASUS and they said that corsair said it was an immature BIOS. So I went and bought some PNY ram to try it and same thing. This is the second board I have gotten from them that doesnt work properly!!! I really have a feeling that I mam getting the runaround from them! I had to RMA the first one right outof the box and now all this. And yes, I have had my CPU tested and it works fine!! I am going to deman ASUS send me a new mobo and ill send this one back! I cant go without a computer for 3 weeks due to needing it for work now. Cross your fingers for me!!