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BIOS Setup

fIOMMU Mode (optional)

Enables/disables the IOMMU (I/O Memory Management Unit) for I/O Virtualization.

fSpread Spectrum (optional)

This function reduces the EMI (Electromagnetic Interference) generated by

modulating clock generator pulses.

[Enabled] Enables the spread spectrum function to reduce the EMI

(Electromagnetic Interference) problem.

[Disabled] Enhances the overclocking ability of CPU Base clock.

Important

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.

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.

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.

fRelaxed EDC throttling [Auto] (optional)

Relaxed EDC throttling reduces the amount of time the processor will throttle the

cores.

[Auto] AMD's recommendation

[Enabled] Reduce the amount of time the processor will throttle.

[Disabled] Part-specific EDC throttling protection enabled.

fAMD Cool’n’Quiet [Enabled]

The Cool’n’Quiet technology can effectively and dynamically lower CPU speed and

power consumption.

fSVM Mode [Enabled]

Enables/ disables the AMD SVM (Secure Virtual Machine) Mode.

fBIOS PSP Support [Enabled] (optional)

Enables/ disables the BIOS PSP support. It manages PSP sub-items including all

C2P/P2C mailbox, Secure S3, fTPM support.

fPower Supply Idle Control [Auto] (optional)

It allows you to select the power-saving control mode for the CPU when all cores

are in a non-CO state. If set to Auto, BIOS will conﬁgure these settings.

fCPU VDD_SoC Current Optimization [Auto] (optional)

Sets the currents of CPU VDD and SoC. If set to Auto, BIOS will conﬁgure this

setting automatically.

[Auto] This setting will be configured automatically by BIOS.

[Custom Setting] Allows you to set the currents manually.

Questions and Answers:

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MSI B450 TOMAHAWK Specifications

General