ASROCK FM2A88X Extreme6+ Handbuch Seite 19

2.3 Installation of Memory Modules (DIMM)
This motherboard provides four 240-pin DDR3 (Double Data Rate 3) DIMM
slots, and supports Dual Channel Memory Technology.
Dual Channel Memory Configuration
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1. For dual channel configuration, you always need to install identical (the
same brand, speed, size and chip-type) DDR3 DIMM pairs.
2. It is unable to activate Dual Channel Memory Technology with only one or
three memory module installed.
3. It is not allowed to install a DDR or DDR2 memory module into a DDR3
slot; otherwise, this motherboard and DIMM may be damaged.
4. If you adopt DDR3 2600/2400/2133/1866/1600 memory modules on this
motherboard, it is recommended to install them on DDR3_A2 and DDR3_
B2 slots.
DDR3_A1 DDR3_A2
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The DIMM only fits in one correct orientation. It will cause permanent dam-
age to the motherboard and the DIMM if you force the DIMM into the slot at
incorrect orientation.
ASRock FM2A88X Extreme6+ Motherboard
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DDR3_B1 DDR3_B2
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