ASRock G43Twins-FullHD User Manual - Page 19

2.5 Installation of Memory Modules (DIMM) This motherboard provides two 240-pin DDR2 (Double Data Rate 2) DIMM slots and two 240-pin DDR3 (Double Data Rate 3) DIMM slots, and supports Dual Channel Memory Technology. For dual channel configuration, you always need to install identical (the same brand, speed, size and chip-type) DDR2/DDR3 DIMM pair in the slots of the same color. In other words, you have to install identical DDR2 DIMM pair in Dual Channel A (DDRII_1 and DDRII_2; Yellow slots; see p.12 No. 4) or identical DDR3 DIMM pair in Dual Channel B (DDR3_A1 and DDR3_B1; Green slots; see p.12 No.5), so that Dual Channel Memory Technology can be activated. You may refer to the Dual Channel Memory Configuration Table below. Dual Channel DDR2 Memory Configurations (DS: Double Side, SS: Single Side) DDRII_1 (Yellow Slot) 2 memory modules SS 2 memory modules DS DDRII_2 (Yellow Slot) SS DS Dual Channel DDR3 Memory Configurations (DS: Double Side, SS: Single Side) DDR3_A1 (Green Slot) 2 memory modules SS 2 memory modules DS DDR3_B1 (Green Slot) SS DS 1. If you want to install two memory modules, for optimal compatibility and reliability, it is recommended to install them in the slots of the same color. In other words, install them in the set of yellow slots (DDRII_1 and DDRII_2), or in the set of green slots (DDR3_A1 and DDR3_B1). 2. If you install only one memory module or two non-identical memory modules, it is unable to activate the Dual Channel Memory Technology. 3. It is not allowed to install a DDR3 memory module into DDR2 slot or install a DDR2 memory module into DDR3 slot; otherwise, this motherboard and DIMM may be damaged. 4. DDR2 and DDR3 memory modules cannot be installed on this motherboard at the same time. 19