ADLINK iSeries Monitor 18/21 - Manual (Page 67)

BIOS Setup 55
TPZ-1300
And settings for
Hyper-Threading
Enabled for Windows XP and Linux (OS is optimized for Hyper-
Threading Technology) and disabled for other OS (OS not opti-
mized for Hyper-Threading Technology).
Execute Disable Bit
Enabled in XP, can prevent certain classes of malicious buffer
overflow attacks when combined with a supporting OS.
Limit CPUID Maximum
Disabled for Windows XP.