wait what? it doesn't come with a disc drive?? that seems an odd choice.
Just contact customer support.
I had the same issue, but thought it was just an isolated case, they shipped a DVD rewriter to me the same day.
It seems the ordering process is missing the DVD drve from the build sheet.
Yeah fair play to the guys though they've sent me one out to be with me before 12 tomorrow. Was your "System Information" showing the correct CPU cos mines showing an i5 4670k, but I'm not sure if any drivers have been installed cos I can't get online! I get "no network adaptor installed" so when I get home from work I'm gonna download the Gigabyte drivers on a USB stick and have a play!