Can I damage my board or RAM if I use non-Dual Channel Certified RAM in Dual Channel Operation?

You can't really damage your board just by trying to run two sticks of identical, but otherwise unpaired memory sticks in Dual Channel mode, but be aware that sometimes a board cannot handle the SPD settings of memory in Dual Channel mode (yes, even if you have paired memory this might be an issue!). This means that for some reason the SPD timing settings are incompatible with the board and prevent the board from being able to POST. The only solution in this situation is to put in another stick of RAM who's SPD might reset your BIOS settings.