VIA 693/693A AT MAINBOARD
AWARD BIOS SETUP
4-10
USB Keyboard Support :
(default setting: Disabled)
Select
Enabled
if your system contains a Universal Serial Bus (USB) controller and
you have a USB keyboard.
The choice: Enabled, Disabled.
Auto Detect DIMM/PCI Clk:
( Default setting: Enabled )
When you select “Enabled”, the mainboard will detect the presence of devices on
DIMM and PCI slots. When there is no device presented, the clock on the related
DIMM and PCI slot will be disabled to reduce the electro magnetic interference
(EMI).
Spread Spectrum:
( Default setting: Disabled )
When you select “Enabled”, the special feature designed in the Apollo chipset will
be triggered and reduce the EMI as mentioned above.
CPU Host/ PCI Clock:
( Default setting: “Default” )
This selection field is used to decide the CPU FSB and PCI clock. Basically, this
mainboard is designed by using the VIA 82C693(A) chipset and it supports both the
100MHz and 66MHz FSB frequency (VIA693A supports 133MHz). When you
select “default” setting, the system BIOS will detect the CPU type and decide the
FSB clock automatically. You may also use this field to select different FSB clock
and force your CPU to run at higher speed. ( be sure to make sure your system
devices are fast enough before you can change to such setting)
When you have decided the FSB clock, you will have to use JP7, JP8, JP9 and JP10
to select the CPU clock ratio to decide the CPU speed. please refer to Section 3.3-G
for details of the jumper settings.
IMPORTANT: As you may have noticed,the higher FSB frequency will surely give
you the higher system performance. However, the PCI clock also increased
at the same time. If the peripherial is not fast enough, your PC system will
become very unstable when you change the Host clock. it is not
recommended because it may cause the system unstable,
