PC-DL deluxe Xeon mobo pc2100 RAM?

The online manual for the Asus PC-DL -Deluxe Dual Xeon mobo is in
chinese, so I'm asking this question here.

This mobo supports dual DDR333 PC2700 memory. I will be getting the
CPUs within a few days.

This mobo has two blue DIMM slots and two black DIMM slots.

Question: Will this mobo run with only one stick of memory or does it
require
two? I.e. does a mobo that supports Dual DDR333 require two sticks in
the appropriate slots to run?

Thank You!!!!!!!!

Don