Originally Posted by
Xvys
It seems many E8400's have core temp sensors which report incorrect low temperature readings. These false readings are being reported in all software monitoring programs.
I had a E8400 which reported idle temps of 17C in one core and 34C in the other. Under load, the 34C core readings were frozen until it exceeded 34C.
I exchanged that processor a new one, albeit from the exact same batch, but the new cpu more correctly has core temps of 38C/36C (4.0Ghz with 1.34v).
Programs like CoreTemp read the diode right in the cpu, so software updates or bios upgrades will have no effect on these false readings.
Some E8400 purchasers are being told to just ignore these false core readings and instead rely on the "cpu temp" reading, rather than core temps.