Asus P5E WS PROFESSIONAL User Manual - Page 39

2.4 System memory 2.4.1 Overview The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets. A DDR2 module has the same physical dimensions as a DDR DIMM but is notched differently to prevent installation on a DDR DIMM socket. DDR2 modules are developed for better performance with less power consumption. The figure illustrates the location of the DDR2 DIMM sockets: ® P5E WS PRO DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2 P5E WS Professional 240-pin DDR2 DIMM sockets Channel Channel A Channel B Sockets DIMM_A1 and DIMM_A2 DIMM_B1 and DIMM_B2 This chipset officially supports DDR2 800/667MHz. With the ASUS Super Memspeed Technology, the motherboard natively supports up to DDR2 1066MHz and provides more ratio setting items than the chipset officially supports. Refer to the table below for details. FSB 1333 1066 DDR2 1066 800 667 1066 800 667 ASUS P5E WS Professional 2-13