AMD Socket AM2+ Quad Core AMD Processor SB750 - Manual (Page 51)

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APPENDIX
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)
Figure 1