Asus Z8PH-D12/IFB - Manual (Page 33)

ASUS Z8NH-D12 Series 2-15
2.4 System memory
2.4.1 Overview
The motherboard comes with twelve (12) Double Data Rate 3 (DDR3) Dual Inline
Memory Modules (DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is
notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules
are developed for better performance with less power consumption.
The figure illustrates the location of the DDR3 DIMM sockets: