DFI G7B630-B - Manual (Page 68)

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BIOS Setup
Limit CPUID MaxVal
The CPUID instruction of some newer CPUs will return a value
greater than 3. Problems will occur only in certain operating systems.
The default is Disabled because this problem does not exist in the
Windows series operating systems. If you are using an operating
system other than Windows, this problem may occur. To avoid tihs
problem, enable this field to limit the return value to 3 or lesser than
3.
C1E Function
The options are Auto and Disabled.
Execute Disable Bit
When this field is set to Disabled, it will force the XD feature flag to
always return to 0.
Virtualization Technology
When this field is set to Enabled, the VMM can utilize the additional
hardware capabilities provided by Vanderpool Technology.