Foxconn Quantumian1 - Manual (Page 45)

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This item is used to select the CPU VTT (Uncore) voltage. [Default] means the voltage is
according to your CPU model. It can be 1.005V or 2.011V.
►Patsburg PCH Core Voltage
This item is used to set the CougarPoint PCH Core Voltage.
►DRAM Voltage (VDIMM1 & VDIMM2)
This item is used to set the DRAM voltage. The maximum available for adjustment is 2.307V.
Adjusting the voltage beyond the memories default voltage could result in damage to memory
controller.
►DRAM Voltage (VDIMM3 & VDIMM4)
This item is used to set the DRAM voltage. The maximum available for adjustment is 2.307V.
Adjusting the voltage beyond the memories default voltage could result in damage to memory
controller.