ASRock X99 Extreme4/3.1 Quick Installation Guide - Page 17
Installation of Memory Modules DIMM
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X99 Extreme4/3.1 2.3 Installation of Memory Modules (DIMM) his motherboard provides eight 288-pin DDR4 (Double Data Rate 4) DIMM slots, and supports Quad Channel Memory Technology. 1. For quad channel coniguration, you always need to install identical (the same brand, speed, size and chip-type) DDR4 DIMM pairs. 2. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4 slot; otherwise, this motherboard and DIMM may be damaged. 3. he DIMM only its 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. Quad Channel Memory Coniguration Priority DDR4_A1 DDR4_A2 DDR4_B1 DDR4_B2 DDR4_C1 DDR4_C2 DDR4_D1 DDR4_D2 1 Populated Populated Populated Populated 2 Populated Populated Populated Populated Populated Populated Populated Populated • Due to Intel® CPU spec deinition, please install the memory modules on DDR4_A1, DDR4_B1, DDR4_C1 and DDR4_D1 for irst priority. If the four DDR4 DIMM slots above are fully installed, and you want to use more than four memory modules, please install the other memory modules from let to right (from DDR4_A2, DDR4_B2, DDR4_D2 to DDR4_C2.) • If only two memory modules are installed in the DDR4 DIMM slots, then Dual Channel Memory Technology is activated. If three memory modules are installed, then Triple Channel Memory Technology is activated. If more than four memory modules are installed in the DDR4 DIMM slots, then Quad Channel Memory Technology is activated. English 15