Shuttle XPC User Manual page 16

Limit CPUID MaxVal
Set Limit CPUID MaxVal to 3,Should Be "Disabled" for WinXp.
Ø The Choice: Disabled or Enabled.
Note: Some older O.S.'s (Win98,WinMe..) cannot handle a CPUID
C1E Function
When disabled, processor can't transitions to a lower core frequency and
voltage.
Ø The Choice: Auto or Disabled.
Execute Disable Bit
When disabled, forces the XD feature flag to always return 0.
Ø The Choice: Enabled or Disabled.
Note: CPU support, Execute Disable Bit item appear.
Virtualization Technology
When enabled, a VMM can utilize the additional hardwarecapabilities
provided by Vanderpool Technology.
Ø The choice: Enabled or Disabled.
Hard Disk Boot Priority
This item allows you to select Hard Disk Book Device Priority.
Bios Write Protect
This item allows you to enable or disable the Bios Write Protect.
If you want to flash BIOS, you must set it [Disabled].
Ø The choice: Enabled or Disabled.
CPU L1&L2 Cache
All processors that can be installed in this mainboard use internal L1 and
L2 cache memory to imporve performance.
Leave this item at the default value for better performance.
Ø The choice: Enabled or Disabled.
10
MaxVal greater than 3. Please choose "Enabled" if you use one
of those O.S. If your O.S. is WinXP or Win2000, we suggest you
"Disabled" the item.