Thank Aioanei and Camaleón! Even bios in my Slot 1 machine which use P3 or C1 can show fan speed or cpu temp The bad thing about HP is their bios doesn't show CPU and fan info though asus bios show! I read doc from lm-sensor They say their reading isn't reliable (they ask me to compare their reading with those in bios) I have run "sensors" command the fan reading is 0 it doesn't show cpu temp