I have a Soyo KT333 Dragon Plus with an AMD XP 1900+. I have placed a temp sensor, underneath the CPU heatsink next to the "chip" but not on top of it. I also installed the software, "SmartGuardian", which tells the CPU temp and such. I did this to see if both, the LED and "Smart" display the same temp. They do not. Now the LED displays the CPU temp being 39.5 C (with side of case off), 45 C (with side of case on). "Smart" displays the temp being 42 C (with side of case off), 47 C (with side of case on). My question is: Which is displaying the correct or most accurate temp?