Software • BIOS options
222
Automation PC 810 with GM45 CPU board user's manual V1.28
BIOS setting
Description
Configuration options
Effect
Information:
This setting can be changed in ACPI
operating systems by activating Intel
SpeedStep technology.
Minimum
Throttles the CPU speed.
LFM = Low Frequency Mode = 1.6 GHz
Disabled
Disables this function
On Demand Clock Modula-
tion
Option for setting CPU performance using "On
Demand Clock Modulation".
12.5%, 25%, 37.5%,
50%, 62.5%, 75%, 87.5%
Example: 75% means a performance increase
of 25%.
Disabled
Disables this function Both processors are run
at the same frequency.
Intel(R) C-State Tech.
This setting allows the operating system to set
processor clock rates on its own, thereby saving
energy.
Enabled
Enables this function The processors are run at
different frequencies, thereby saving energy.
Disabled
Disables this function
Enhanced C-States
1)
This setting allows the operating system to set
processor clock rates on its own, thereby saving
energy.
Enabled
Enables this function
Table 180: GM45 Advanced CPU Configuration (Setting options)
1)
This setting is only shown if
Intel(R) C-State Tech.
is set to
Enabled
.
1.4.6 Chipset Configuration
Advanced
Advanced Chipset Settings
Options
DRAM Refresh Rate [Auto]
Auto
Memory Hole [Disabled]
7,8µs
DIMM Thermal Control [Disabled] 3,9µs
High Precision Event Timer [Disabled]
IOAPIC [Enabled]
APIC ACPI SCI IRQ [Disabled]
POST Code Output [PCI]
Select Screen
Select Item
+- Change Option
F1 General Help
F10 Save and Exit
ESC Exit
BIOS SETUP UTILITY
v02.59 (C)Copyright 1985-2005, American Megatrends, Inc.
Figure 116: GM45 Advanced Chipset Configuration
BIOS setting
Description
Configuration options
Effect
Auto
DRAM Refresh is read from the SPD data of the
DRAM module.
7.8 μs
Manual setting for the DRAM refresh rate.
DRAM Refresh Rate
Option for setting the DRAM refresh rate.
3.9 μs
Manual setting for the DRAM refresh rate.
Disabled
Disables this function
Memory Hole
Option for ISA cards with frame buffer. Not impor-
tant for an APC810.
15MB-16MB
This address area is reserved.
Disabled
Surface temperature not limited.
DIMM Thermal Control
Option for setting the maximum surface temper-
ature of the DIMM module. The module is cooled
by limiting the memory bandwidth if the defined
surface temperature is reached.
40°C, 50°C, 60°C,
70°C, 80°C, 85°C, 90°C
Temperature limit value for the limitation.
Enabled
Enables this function This function is recom-
mended for multimedia applications.
High Precision Event Timer The HPET is a timer inside the PC. It is able to
trigger an interrupt with a high degree of accu-
racy, which allows other programs to better syn-
chronize a variety of applications.
Disabled
Disables this function
Table 181: GM45 Advanced Chipset (Setting options)
