AMD KM780V user manual Appendix, Solution:

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APPENDIX I

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

Figure 2

Solution

We recommend users choose motherboards with power design of 4-phase, 4+1 phase or more for CPUs that demand 89W or 95W power consumption.

We recommend users choose motherboards with power design of 5-phase, 5+1 phase or more

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Contents KM780V Rev Environmental Safety Instruction Environmental Protection AnnouncementTable of Content Chapter Special Features of Motherboard Item ChecklistDesign ChipsetCPU Socket AM2+ Memory SocketLayout Diagram For KM780V modelHardware Installation Install Socket AM2+ Supported AMD ProcessorInstall Memory Maximum CapacityExpansion Cards Connectors, Headers & Jumpers Setting ConnectorsFloppy drive Connector 34-pin block FDD Primary IDE Connector 40-pin block IDE1Sub 15-pin Connector VGA HeadersDigital Visual Interface DVI High-Definition Multimedia Interface HdmiSpeaker connector SPEAK1 Power LED PWR LED1Reset switch lead Reset Power switch PWR BTNFAN Power Headers SYSFAN1, SYSFAN2 3-pin, Cpufan 4-pin CD Audio-In Headers 4-pin CDIN1Jumper Setting Keyboard/USB function Enabled/Disabled JP1HDMISPDIFOut header SPDIFOut Cmos RAM Clear 3-pin JbatCmos RAM Clear Setting Useful Help How to Update BiosTrouble Shooting Chapter Software Setup Software ListWindows XP Solution: AppendixCool air flowing Hot air flowing out