dannyboy2233 :
Yes, you can. However, it won't utilize dual-channel RAM. What I would do is RMA the board in order to achieve full functionality.
I beg to differ with @
dannyboy2233 about the compatibility of 8GB but I'd definitely agree with him on the RMA part. It is better to replace the motherboard. Maximum your motherboard supports is 8GB. It has 2 slots and max per slot is 4GB. Hence, single 8GB is not compatible and there is no release of any BIOS update so it will not work.
Btw, how did you come to the conclusion that the slot is defective? Just curious.:?: