Be Careful! If the sensor the BIOS uses is far off, then it can turn off the fan and cause the CPU to overheat. If it is just the core temps that are off, it is ok. Check the temp reported in BIOS, the "CPU" temp, and the "core" temp. Also, updating to the latest BIOS sometimes helps. And, like hunter said, it is physically impossible. Unless of course that is your own made up temperature scale ("degrees" is meaningless, need a C or F or whatever).