Computer Hardware User Manual

1-14
X6QT8/X6QTE+ User's Manual
Thermal Management/CPU VRM Overheat
When the CPU reaches 70
0
C and above (Overheat), the CPU will go into throttling
state. CPU Voltage will decrease to reduce CPU power consumption. When the
CPU temperature reaches 78
0
C (*Default) and above, the Overheat LED and the
Alarm Buzzer will be turned on in addition to the slowing down of the CPU. Once
the CPU temperature returns to normal, the CPU voltage will return to normal as
well, allowing the CPU to run at maximum speed.
VRM Protection
When the CPU VRM temperature reaches the threshold preset by the user in the
BIOS, the system will go into TM (Thermal Management) mode. The CPU will slow
down and the VRM current will drop to prevent the VRM from overheating. (The
settings are: 88
0
C, *98
0
C, 108
0
C.) (*Default)
Auto-Switching Voltage Regulator for the CPU Core
The auto-switching voltage regulator for the CPU core can support up to 20A current.
This will allow the regulator to run cooler and thus make the system more stable.
1-5 ACPI Features
The ACPI (Advanced Confi guration and Power Interface) specifi cation defi nes a
fl exible and abstract hardware interface that provides a standard way to integrate
power management features throughout a PC system, including its hardware, op-
erating system and application software. This enables the system to automatically
turn on and off peripherals such as CD-ROMs, network cards, hard disk drives and
printers. This also includes consumer devices connected to the PC such as VCRs,
TVs, telephones and stereos.
In addition to enabling operating system-directed power management, ACPI
provides a generic system event mechanism for Plug and Play and an operating
system-independent interface for confi guration control. ACPI leverages the Plug
and Play BIOS data structures while providing a processor architecture-independent
implementation that is compatible with Windows 2000, Windows XP, and Windows
Server 2003.
Slow Blinking LED for Suspend-State Indicator
When the CPU goes into a suspend state, the chassis power LED will start blinking
to indicate that the CPU is in suspend mode. When the user presses any key, the
CPU will wake-up and the LED will automatically stop blinking and remain on.