I don't think Supermicro gives out the CD & manual anymore (good moves on their part to save cost since no one really uses them). You just get the board, IO shield & 2 cables with the bulk pack. It's usually $5 ~ $15 cheaper (depending on the boards). You do get the "pretty blue" box with the retail packWith the -B you get the MB, IO Shield, book and CD in white or brown cardboard packaging. -O is retail packaging (pretty blue box) and they send random SATA cables and other junk that you probably don't need/want anyway.