bios
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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
Name | Recommended setting | Description |
---|---|---|
ACPI | Enabled | Advanced Configuration and Power Interface |
ACPI Standby state | S3 | See Advanced Configuration and Power Interface Power states |
DVMT Mode Select | DVMT Mode | See DVMT Mode Select |
DVMT/FIXED Memory | Maximum DVMT | |
Execute Bit Support | Enabled | See NX bit (Intel XD bit) |
HPET | Enabled | See High Precision Event Timer |
Intel EIST, Speedstep | Enabled | Allow the clock speed of the processor to be dynamically changed by software. See Speedstep |
IOAPIC | Enabled | See Intel I/O Advanced Programmable Interrupt Controller |
MPS Table version | 1.4 | MultiProcessor Specification (MPS) |
PCI BusMaster | Enabled | When 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 timer | 32 | The PCI Latency Timer controls how long each PCI device can hold the bus before another takes over |
Primary Graphics Adapter | IGD | IGD Integrated Graphics Adapter, the graphics adapter on the motherboard |
Recall VGA BIOS from S3 | Disable | |
Set Limit CPUID MaxVal to 3 | Disabled | Only enable if your OS can not handle values >3 |
Spread spectrum | Disabled | EMI prevention. See Spread Spectrum Control |
VGA Share Memory | What 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