Manual for SynactiX 5EP/5EI
BIOS Protection Jumper (JAV)
The BIOS of the mainboard is inside the FWH. If the jumper JAV is set as closed, you will
be unable to flash the BIOS to the mainboard. However in this status, the system BIOS is
protected from being attacked by serious virus such as CIH virus.
Setting the jumper JAV as open (default), meanwhile disabling the “Flash Write Protect” item
in AWARD BIOS CMOS Setup, allows you to flash the BIOS to the flash ROM in FWH.
The DMI (Desktop Management Interface) system information such as the CPU type, speed,
memory size, and expansion cards will be detected by the onboard BIOS and stored in the
flash ROM in FWH. Whenever the system hardware configuration is changed, DMI informa-
tion will be updated automatically. However, setting jumper JAV as closed makes flashing
BIOS and updating DMI information impossible.
Additional Information
When you change a new CPU, whose bus ratio has not been locked, and is lower than that
of the previous one, be sure to clear CMOS once before boot up, otherwise the previous
CPU’s higher bus ratio saved in CMOS will still take effect, and the new CPU may not work
at that high speed.
Flash Write Disabled
Flash Write Enabled
JAV
JAV
Chapter 2
