HP EliteDesk 800 G4 Maintenance and Service Guide - Page 84

I/O Address A/B, Extended Idle Power States

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Table 5-3 Computer Setup-Advanced (for advanced users) (continued) Option Heading NOTE: Serial Port A and/or Serial Port B settings are available depending on installed hardware. I/O Address A/B Lets you specify the address. Default is enabled. Interrupt A/B Lets you specify the address. Default is enabled. Lets you disable the following ports (default is enabled): ● SATA connectors ● Front USB ports ● Rear USB ports ● USB Legacy Port Charging Enables USB charging port capability when the system is in hibernate or shutdown state. ● Front USB Type-C Downstream Charging Enables USB charging port capability when the system is in hibernate or shutdown state. Restrict USB Devices Specify the following categories of USB devices to enable: ● Allow all USB devices (default) ● Allow only keyboard and mouse ● Allow all but storage devices and hubs. When some devices are restricted, the system will disable USB ports that do not meet the allowed criteria. This feature is usually combined with similar policies within the operating system since USB devices can be moved to different ports. The ports disabled by the BIOS will remain disabled until the system is restarted. Option ROM Launch Policy These policies control whether Legacy Option ROMs or UEFI drivers are loaded. Default is 'All UEFI' for Windows 10 or later. Configure Option ROM Launch Policy ● All legacy ● All UEFI ● All UEFI except video Power Management Options Runtime Power Management (enable/disable) Allows certain operating systems to reduce processor voltage and frequency when the current software load does not require the full capabilities of the processor. Default is enabled. Extended Idle Power States (enable/disable) Allows certain operating systems to decrease the processors power consumption when the processor is idle. Default is enabled. S5 Maximum Power Savings (enable/disable) Enabling this feature reduces the power of the system as much as possible in the S5 state. Power is removed from the wake up circuitry, the expansion slots, and any management features while in S5. Default is disabled. SATA Power Management (enable/disable) 76 Chapter 5 Computer Setup (F10) Utility

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Table 5-3
Computer Setup—Advanced (for advanced users) (continued)
Option
Heading
NOTE:
Serial Port A and/or Serial Port B settings are available depending on installed hardware.
I/O Address A/B
Lets you specify the address. Default is enabled.
Interrupt A/B
Lets you specify the address. Default is enabled.
Lets you disable the following ports (default is enabled):
●
SATA connectors
●
Front USB ports
●
Rear USB ports
●
USB Legacy Port Charging
Enables USB charging port capability when the system is in hibernate or shutdown state.
●
Front USB Type-C Downstream Charging
Enables USB charging port capability when the system is in hibernate or shutdown state.
Restrict USB Devices
Specify the following categories of USB devices to enable:
●
Allow all USB devices (default)
●
Allow only keyboard and mouse
●
Allow all but storage devices and hubs.
When some devices are restricted, the system will disable USB ports that do not meet the allowed
criteria. This feature is usually combined with similar policies within the operating system since USB
devices can be moved to
different
ports. The ports disabled by the BIOS will remain disabled until the
system is restarted.
Option ROM Launch
Policy
These policies control whether Legacy Option ROMs or UEFI drivers are loaded. Default is ‘All UEFI’ for
Windows 10 or later.
Configure
Option ROM Launch Policy
●
All legacy
●
All UEFI
●
All UEFI except video
Power Management
Options
Runtime Power Management
(enable/disable)
Allows certain operating systems to reduce processor voltage and frequency when the current software
load does not require the full capabilities of the processor. Default is enabled.
Extended Idle Power States
(enable/disable)
Allows certain operating systems to decrease the processors power consumption when the processor is
idle. Default is enabled.
S5 Maximum Power Savings
(enable/disable)
Enabling this feature reduces the power of the system as much as possible in the S5 state. Power is
removed from the wake up circuitry, the expansion slots, and any management features while in S5.
Default is disabled.
SATA Power Management
(enable/disable)
76
Chapter 5
Computer Setup (F10) Utility