Acer Network Device Altos R520 User Manual
Page 108

4 BIOS setup
98
Virtualization 
Technology
Enables or disables the system to run 
multiple operating systems and 
applications in different partition. 
Disabled
Enabled
Execute Disable 
Bit
When Enabled, the processor disables 
code execution when a worm attempts 
to insert a code in the buffer preventing 
damage and worm propagation. 
When Disabled, the processor forces the 
Execute Disable Bit feature flag to 
always return to 0. 
Note: This parameter is hidden if the 
processor does not support this function. 
Enabled
Disabled
Hardware 
Prefetcher
Enables or disables the speculative 
prefetch unit within the processor(s). 
Note: Changing this feature may affect 
system performance. 
Enabled
Disabled
Adjacent Cache 
Line Prefetch
When Enabled, cache lines are fetched 
in pairs (even line + odd line)
When Disabled, only current cache line 
required is fetched. 
Note: Changing this feature may affect 
system performance.
Enabled
Disabled
Processor 
Re-Test
When Enabled, all processors will be 
activated and retested on the next boot. 
This option will be automatically reset to 
disable on the next boot. 
Disabled
Enabled
Processor # 
Information
Press Enter to access the Processor # 
Information submenu. 
Parameter
Description
Option
