MSI Keeper 945GM manual MS-9641 Mainboard Spread Spectrum

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MS-9641 Mainboard

Spread Spectrum

When the motherboard’s clock generator pulses, the extreme values (spikes) of the pulses creates EMI (Electromagnetic Interference). The Spread Spectrum function reduces the EMI generated by modulating the pulses so that the spikes of the pulses are reduced to flatter curves.

Important

1.If you do not have any EMI problem, leave the setting at [Disabled] for optimal system stability and performance. But if you are plagued by EMI, select the value of Spread Spectrum for EMI reduction.

2.The greater the Spread Spectrum value is, the greater the EMI is reduced, and the system will become less stable. For the most suitable Spread Spectrum value, please consult your local EMI regulation.

3.Remember to disable Spread Spectrum if you are overclocking because even a slight jitter can introduce a temporary boost in clock speed which may just cause your overclocked processor to lock up.

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Contents MS-9641 V1.X Mainboard G52-96411x1Copyright Notice TrademarksRevision History Technical SupportSafety Instructions Micro-Star International MS-9641 FCC-B Radio Frequency Interference StatementWeee Waste Electrical and Electronic Equipment Statement Page Vii Contents Getting Started Getting StartedMainboard Specifications FSBLAN IDEGetting Started Watch Dog Timer AccessoryForm Factor MountingMainboard Layout MS-9641 v1.X Micro-ATX MainboardHardware Setup Hardware SetupQuick Components Guide CPU Central Processing Unit CPU & Cooler Set Installation Hardware Setup Memory Population Rules MemoryDDR2 Installing Memory Modules Power Supply ATX 24-Pin Power Connector ATX1ATX 12V Power Connector JPW0 ATX1USB Connectors Serial Port ConnectorFront Panel MS-9641 Mainboard LAN RJ-45 Jack LEDConnectors Hard Disk Connector IDEB0Compact Flash Card Slot CF0 IDEB0Serial Ataii Connectors SATA1~SATA4 SATA4 SATA3 SATA2 SATA1Fan Power Connectors CPUFAN0, SYSFAN1, AUXFAN0 Front Panel Connectors JFP1CPUFAN0 SYSFAN1 AUXFAN0 JFP1FUSB2 Front USB Connector FUSB2USB 2.0 Bracket SMBus Connector Smbus Serial Port Connector COM0Smbus COM0Lanled LanledBy Pass Function Set High sample code AssemblySet High sample code C Language Set Low sample code C Language MS-9641 Mainboard Set Low sample code AssemblyWatch Dog Function DX,AL and AL,0F7H OUT DX,AL Jumpers Clear Cmos Jumper CLRCMOS0AT/ATX Power Select Jumper J5 JcfselSlots Golden FingerPCI Peripheral Component Interconnect Slots TOP View B94 Bottom View A94Bios Setup Bios SetupEntering Setup Press F2 to enter SetupControl Keys Getting HelpGeneral Help F1 Main MenuMenu Bar Main Date mmddyyTime hhmmss IDE Channel 0 Master/Slave, IDE Channel 1 Master/SlaveAccess M ode CapacityCylinder HeadAdvanced Advanced Bios Features Virus WarningCPU L3 Cache Quick Power On Self Test Apic ModeHyper-Threading Technology MPS Version Control For OSBios Setup Console Redirection Agent after bootFlow Control Baud RateDram RAS# to CAS# Delay Precharge Delay tRASCAS Latency Time Dram RAS# PrechargeBios Setup VGA Setting Boot DisplayPEG/Onchip VGA Control PEG ForceIDE DMA Transfer Access On-Chip Primary/Secondary PCI IDEBios Setup IDE Primary/Secondary Master/Slave PIO On-Chip Serial ATA Setting Sata ModeSata Port Speed Settings Pata IDE Mode / Sata PortUSB Controller, USB 2.0 Controller MS-9641 Mainboard Onboard Device LAN ByPassUSB Keyboard/ Mouse Support Bios Setup Super IO Device Onboard Serial Port 1 Uart Mode SelectIR Transmission Delay UR2 Duplex ModeWatch Dog Timer Minutes Power Management Setup Power TypeMS-9641 Mainboard Watch Dog Action PCI Express PMEResume by Alarm Date of Month AlarmTime hhmmss Alarm Boot Up NumLock StatusMS-9641 Mainboard Spread Spectrum Boot Removable Device PriorityMS-9641 Mainboard Hard Disk Boot Priority CD-ROM This setting Refer to Boot PriorityFirst / Second / Third Boot Device Boot Other DeviceSet Supervisor Password Set User PasswordSecurity Security OptionSystem Summary SystemHalt On Smart SYSFan1 / CPUFan1 / SYSFan2 Temperature Smart Fan SettingPC Health Page Load Fail-Safe Defaults Load Optimized DefaultsSave & Exit Setup Exit