Chapter 2
16
Miscellaneous
Parameter
Description
Option
AHCI Port1/2
Displays the status of auto detection of the AHCI device.
Clock to All DIMM/
PCI/PCIE
This item allows you to enable or disable the Clock to all DIMM/PCI/PCIE.
Enabled
Disabled
Spread Spectrum
If you enable spread spectrum, it can significantly reduce the EMI (Electro-
Magnetic Interference) generated by the system.
Enabled
Disabled
Bootup Num-lock
Selects power on state for Num Lock.
On
Off
USB Beep Message
Enables or disables BIOS to display error beeps or messages during USB
device enumeration.
Enabled
Disabled
Summary of Contents for Aspire X3990
Page 1: ...Acer Aspire X3990 Service Guide PRINTED IN TAIWAN ...
Page 12: ...4 Chapter 1 Block Diagram ...
Page 65: ...57 Chapter 3 Install the I O Shielding 1 Install I O shielding into chassis ...
Page 68: ...Chapter 3 60 4 Connect the ATX 24Pin Power cable and ATX 4Pin Power cable to main board ...
Page 75: ...67 Chapter 3 Install the TV Tuner Card 1 Press down the TV Tuner card 2 Fix the two screws ...
Page 76: ...Chapter 3 68 Install the Side Panel 1 Install the side Panel then fix two Screws ...
Page 84: ...Chapter 5 76 M B Placement Jumper and Connector Information Chapter 5 ...