ASRock 775Dual-915GV User Manual - Page 18

2.5 Installation of Memory Modules (DIMM) 775Dual-915GV motherboard provides two 184-pin DDR (Double Data Rate) DIMM slots and two 240-pin DDRII 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) DDR DIMM pair in the slots of the same color. In other words, you have to install identical DDRII DIMM pair in Dual Channel A (DDRII1 and DDRII2; Yellow slots; see p.12 No.5) or identical DDR DIMM pair in Dual Channel B (DDR1 and DDR2; Blue slots; see p.12 No.6), so that Dual Channel Memory Technology can be activated. You may refer to the Dual Channel Memory Configuration Table below. Dual Channel Memory Configurations DDRII1 DDR1 DDRII2 DDR2 (Yellow Slot) (Blue Slot) (Yellow Slot) (Blue Slot) (1) Populated - Populated - (2) - Populated - Populated 1. It is not allowed to install DDR into DDRII slot or DDRII into DDR slot;otherwise, this motherboard and DIMM may be damaged. 2. It is not allowed to install both DDR and DDRII to this motherboard at the same time; otherwise, this motherboard and DIMM may be damaged. 3. This motherboard doesn't support 128Mbit DRAM Cell (128MB/8 cells; 256MB/16 cells). 18