Toshiba Portege R500 Maintenance Manual - Page 206

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