A technician has just installed two memory modules on a motherboard that supports DDR3
RAM with the bus speed up to 1600 MHz. The specifications of memory are DDR3 1066
MHz for one module and DDR3 1333 MHz for another. On which of the following bus speeds
will the system function?

A.
800 MHz

B.
1000 MHz

C.
1066 MHz

D.
1600 MHz

Explanation:

http://en.wikipedia.org/wiki/DDR3_SDRAM