MSI a6500 User Guide
This item allows you to enable or disable PowerNow function. When set
to Enabled, the system always operates in a conserve power mode. If
you want to optimize the processor, set this item to Disabled, so that the
processor’s speed will vary depending on the use of your operating system
and applications. Default setting is set to Enabled.
PCI Latency Timer
This item controls how long each PCI device can hold the bus before
another takes over. When set to higher values, every PCI device can
conduct transactions for a longer time and thus improve the effective PCI
bandwidth. For better PCI performance, you should set the item to higher
values. Setting options: 32, 64, 96, 128, 160, 192, 224, and 248.
Legacy USB Support
Selecting Enabled allows users to use USB devices, such as mouse,
keyboard, or portable disk, in DOS system; or allows users to boot the
system by USB device. Setting options: Auto, Enabled and Disabled.
SATA Mode Selection
Use this item to enable or disable the AHCI (Advanced Host Controller