Toshiba r500 manual Ahci

3 Tests and Diagnostics 3.31 BIOS SETUP

(b)PCI Express Link ASPM

This option set the power-saving function of PCI Express on the following conditions.

Auto	PCI Express devices are not used while battery
	operation. (Default)
Disabled	Disable the Power-saving function and drive
	with maximum performance.
Enabled	PCI Express devices are not used.

(c) Enhanced C-States

This option set the power-saving function of Enhanced C-States on the following conditions.

Enabled	This lowers the power consumption. (Default)
Disabled	This does not lower the power consumption.

9.Drives I/O

This option displays the address and interrupts level for hard disk drive and optical disk drive. It is for information only and cannot be changed.

(a)Built-in HDD

This option displays the setting of the address and interrupt level of the HDD. This cannot be changed.

(b)SATA Controller Mode

This feature sets the SATA Controller Mode.

Note: The SATA Controller Mode is supported with some models..

AHCI	Sets AHCI which is the mode for Windows Vista™
	(Default).
Compatibility	Sets the mode for legacy OS. Use this mode when
	the driver corresponding to AHCI is not used.
10. PCI Bus

This option displays the interrupt level for the Card Bus in the computer. It is for information only and cannot be changed.

PCI BUS = Serial IRQ10, IRQ11

11. Security Controller

3-94 [CONFIDENTIAL] PORTEGE R500 Maintenance Manual (960-634)