Hello Ken3663, thank you very much for contacting us through Intel Communities.
Regarding the information you are requesting, I’m more than grad to provide you the URL that contains all the information related to memory settings on the DH87MC motherboard. Intel® Desktop Board DH87MC — System memory
This other link will show you pictures from all supported memory configuration. Desktop Boards — Single and multi-channel memory modes
I hope this information will be helpful for you.