Asus ESC700 G2 - Manual (Page 28)

Chapter 2: Hardware setup 2-10
2.4 System memory
2.4.1 Overview
The motherboard comes with eight Double Data Rate 3 (DDR3) Dual Inline Memory Modules
(DIMM) slots.
A DDR3 module is notched differently from a DDR or DDR2 module. DO NOT
install a DDR or DDR2 memory module to the DDR3 slot.