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BIOS

BIOS settings

After saving the settings sometimes a second boot might be needed for the settings to take effect
Some less obvious BIOS settings and what they mean
Acpi states
Standby explained S1 S3

NameRecommended settingDescription
ACPIEnabledAdvanced Configuration and Power Interface
ACPI Standby stateS3See Advanced Configuration and Power Interface Power states
DVMT Mode SelectDVMT ModeSee DVMT Mode Select
DVMT/FIXED MemoryMaximum DVMT
Execute Bit SupportEnabledSee NX bit (Intel XD bit)
HPETEnabledSee High Precision Event Timer
Intel EIST, SpeedstepEnabledAllow the clock speed of the processor to be dynamically changed by software. See Speedstep
IOAPICEnabledSee Intel I/O Advanced Programmable Interrupt Controller
MPS Table version1.4MultiProcessor Specification (MPS)
PCI BusMasterEnabledWhen PCI bus mastering is used, IDE/ATA devices use DMA modes to transfer data instead of PIO. See also PCI IDE Bus Mastering and Wikipedia
PCI latency timer32The PCI Latency Timer controls how long each PCI device can hold the bus before another takes over
Primary Graphics AdapterIGDIGD Integrated Graphics Adapter, the graphics adapter on the motherboard
Recall VGA BIOS from S3Disable
Set Limit CPUID MaxVal to 3DisabledOnly enable if your OS can not handle values >3
Spread spectrumDisabledEMI prevention. See Spread Spectrum Control
VGA Share MemoryWhat is needed

UEFI

Booting from a CD or DVD on an UEFI system

When, on an UEFI based system the system boots from CD but not from DVD check the UEFI settings. There is a setting which has to be set to UEFI to make the system boot from DVD


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bios.txt · Last modified: 24-02-2021 22:10 by wim