ASRock 4CoreDual-SATA2 Quick Installation Guide - Page 13

2.3 Installation of Memory Modules (DIMM) 4CoreDual-SATA2 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 / DDRII DIMM pair in the slots of the same color. In other words, you have to install identical DDRII DIMM pair in Dual Channel A (DDRII_1 and DDRII_2; Yellow slots; see p.2 No.6) or identical DDR DIMM pair in Dual Channel B (DDR1 and DDR2; Blue slots; see p. 2 No.7), so that Dual Channel Memory Technology can be activated. You may refer to the Dual Channel Memory Configuration Table below. Dual Channel Memory Configurations DDRII_1 DDR1 DDRII_2 DDR2 (Yellow Slot) (Blue Slot) (Yellow Slot) (Blue Slot) (1) Populated - Populated - (2) - Populated - Populated 1. It is not allowed to install a DDR memory module into DDRII slot or a DDRII memory module into DDR slot; otherwise, this motherboard and DIMM may be damaged. 2. It is not allowed to install both DDR and DDRII memory modules to this motherboard at the same time; otherwise, this motherboard and DIMM may be damaged. English 13 ASRock 4CoreDual-SATA2 Motherboard