6 cpu core on/off function, 7 onboard devices configuration, Cpu core on/off function -18 – Asus M5A97 R2.0 User Manual
Page 78: Onboard devices configuration -18, Chapter 3

3-18
Chapter 3: BIOS setup
Chapter 3
3.5.6
CPU Core On/Off Function
CPU Core Activation [Auto]
This item lets user turn off cores except core 1, user can turn off 2nd, 3rd, 4th, 5th, etc core
manually. Configuration options: [Auto] [Manual]
The following items appear only when you set the previous item to [Manual]
3rd & 4th Core [Enabled]
Configuration options: [Enabled] [Disabled]
3.5.7
Onboard Devices Configuration
Asmedia USB 3.0 Controller (Rear) [Enabled]
[Enabled]
Enables the rear USB 3.0 controller.
[Disabled]
Disables the controller.
Asmedia USB 3.0 Controller (Front) [Enabled]
[Enabled]
Enables the front USB 3.0 controller.
[Disabled]
Disables the controller.
Asmedia USB 3.0 Battery Charging Support [Disabled]
This item appears only when the Asmedia USB 3.0 Controller (Rear) or Asmedia USB 3.0
Controller (Front) is set to [Enabled].
[Enabled]
Enables the Asmedia USB 3.0 battery charging function.
[Disabled]
Disables this function
Realtek LAN Controller [Enabled]
[Enabled]
Enables the Realtek LAN controller.
[Disabled]
Disables the controller.
Realtek PXE OPROM [Disabled]
This item appears only when you set the Realtek LAN Controller item to [Enabled] and allows
you to enable or disable the Rom Help of the Realtek LAN controller.
Configuration options: [Enabled] [Disabled]
Serial Port Configuration
The sub-items in this menu allow you to set the serial port configuration.
Serial Port [Enabled]
Allows you to enable or disable the serial port (COM).
Configuration options: [Enabled] [Disabled]
Change Settings [IO=3F8h; IRQ=4]
This item appears only when you set the previous item to [Enabled] and allows you to
select the Serial Port base address.
Configuration options: [IO=3F8h; IRQ=4] [IO=2F8h; IRQ=3] [IO=3E8h; IRQ=4]
[IO=2E8h; IRQ=3]