Nvidia MCP 78S User Manual page 50

Subject 1: Regarding the Application of 3-Phase or 3+1 Phase
Power Supply Mold
As a result of the increasing power consumption demand from many AMD CPUs
in current market, we suggest not to use a CPU that demands more than 65W
power consumption at work for an AMD CPU compliant board that comes with
power supply design as 3 phase or 3+1 phase mold and MOSFET design as
working in High SideX1 and Low SideX1 mold so as to avoid MOSFET getting
burned or other phenomena like a halted system or system instability. So please
take notice of the CPU you are using and make sure that it is one that demand not more than 65 W
to ensure long-term working order.
Note：
1. The relation between CPU Power Consumption Amount and Power Phase:
depending on difference in voltage rating, one-phase of power can provide
25~30W to the motherboard.
2. 3- Phase Power Supply Mold: motherboard with 3 inductances for CPU power
supply, and each inductance carries with it 2 MOSFET (6 MOSFETs in total)
(Figure1)
3+1–Phase Power Supply Mold: motherboard with 4 inductances for CPU power
supply, and each inductance carries with it 2 MOSFET (8 MOSFETs in total)
(Figure2)
Solution：
APPENDIX I
Figure 1
Figure 2
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