QDR just means "Quad Data Rate" its the Industry term for "Quad Pumped" FSB, so for instance your 1333Mhz FSB runs at 333Mhz according to your BIOS, see different motherboards ask for different input, like for instance my 680i asks for QDR FSB which is *actual* FSB speeds so when I want to overclock my e6600 from 1066Mhz FSB I select 1333 whereas most motherboard (Gigabyte, Abit, Asus, and others) ask for *Pre-QDR* speeds such as 333 for 1333 or 400 for 1600 (Mhz).
So for your motherboard you're going to have to multiply your FSB setting by 4 to get your *QDR (actual) FSB* so if you set at 400 just multiply it by 4 and you have an actual FSB of 1600Mhz QDR.
Good luck, have fun, and you're welcome =)