Hi, Here is a newbie's newbie question. Please help. Does anyone know which flags mean "Hypertheading" and "64bit capability"?? I can not find documents how to understand the flags in output of "cat /proc/cpuinfo". [root@testnode01 ~]# cat /proc/cpuinfo | grep flags flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl cid xtpr In the above output, does "ht" means hyperthreading? and "lm" means "64bit capability"? If not, any one know where I can find related documents? Thanks a lot. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com