ASRock X38TurboTwins-WiFi Quick Installation Guide - Page 15

3. If a pair of memory modules is NOT installed in the same Dual Channel, for example, installing a pair of memory modules in DDR3_A1 and DDR3_B2, it is unable to activate the Dual Channel Memory Technology. 4. 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. 5. DDR2 and DDR3 memory modules cannot be installed on this motherboard at the same time. 6. To have the best performance with DDR3 1600 XMP memory modules, it is suggested to install one memory module on each channel. For example, install them in the set of green slots (DDR3_A1 and DDR3_B1) or in the set of pink slots (DDR3_A2 and DDR3_B2). Installing a DIMM Please make sure to disconnect power supply before adding or removing DIMMs or the system components. Step 1. Step 2. Unlock a DIMM slot by pressing the retaining clips outward. Align a DIMM on the slot such that the notch on the DIMM matches the break on the slot. English The DIMM only fits in one correct orientation. It will cause permanent damage to the motherboard and the DIMM if you force the DIMM into the slot at incorrect orientation. Step 3. Firmly insert the DIMM into the slot until the retaining clips at both ends fully snap back in place and the DIMM is properly seated. 15 ASRock X38TurboTwins-WiFi / X38TurboTwins Motherboard